1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed3e483ec29f402812322a0806298988fb77e19c480dc1aa55c9dfb5cab928. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d04efea2-9a3a-476f-8e66-2e2ab6a19036.json and https://artists.proofprofile.net/proofs/artist/d04efea2-9a3a-476f-8e66-2e2ab6a19036.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611012009369c13bbf0f65964f234abc2e0d9e6deb57ac53cbf2036c83364df3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9822fd6f35e2f627789c529a127dc0bc7f24ebca1dbcb11b8fba4678b840cd1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f06f3e196f4a0dfbb4b8ad56d19f790c9c8ef1161e90d8f70f9a7467e8b053d. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc5bc55eb43ada90970aa8a56b7ab6af14ee978fc1019515d9e3d8586bc973e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b3de51200e12314961274e0794602a0d343376e2064b62e760887aad364ef. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19b3e07c33a2112c157631517a3933c677d297a4b2438ca92a52dfd9011faa. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa7f05a42a857d6614abb14010988883a91d1bbd5be41c5f4799245e597e34. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefae68b9198081c76490d217a6f8873dd8284dcae33c0d4da0575751c6421e3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae5329ceb154d42b4161c820c25edf54b49e64f48f2dfb0b7f7d6e59dafe1a6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b3de51200e12314961274e0794602a0d343376e2064b62e760887aad364ef. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefae68b9198081c76490d217a6f8873dd8284dcae33c0d4da0575751c6421e3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2d65304e6c63fc59df1f440eee93aedfb1d25e52e61c2f8d61c89931744952. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de8073c1c7f0d4d0b4ef94b7986509ea849a6d86bad8c53a172355f882d3ce. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de8073c1c7f0d4d0b4ef94b7986509ea849a6d86bad8c53a172355f882d3ce. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c49e442b7c67622def3b008c8dd812dadbabfd9087232ab1a34460e00d1fd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c49e442b7c67622def3b008c8dd812dadbabfd9087232ab1a34460e00d1fd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a9524be67813de4b50664bfa2d3e68730caf839f9d2addf92bbb3e07d00c7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53de8073c1c7f0d4d0b4ef94b7986509ea849a6d86bad8c53a172355f882d3ce. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:05:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8601e619f72bc50942395aa2bb8bc4ad5fcda816a6a81865cea82e0e4d00f8. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a9524be67813de4b50664bfa2d3e68730caf839f9d2addf92bbb3e07d00c7. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c49e442b7c67622def3b008c8dd812dadbabfd9087232ab1a34460e00d1fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862101344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108779bdbd0516006e477b38670519d434032d432de6175e851dcdb473be3eb5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108779bdbd0516006e477b38670519d434032d432de6175e851dcdb473be3eb5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be30733a226753cc84245dea4550d39b43574d3b5a49b9b48ada7d258569cb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79a88462211691cff9dd023f9140f2a39ddf53a15b21606d0149041d54560d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be30733a226753cc84245dea4550d39b43574d3b5a49b9b48ada7d258569cb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09889bbd2bff65129ad9f61933c5ee04ffe0f81bd67d9ec89354fc8b205bf0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862301386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbbe34cbd0dc722843f232a7496fd1f0a2cff54e378f8ce07a2b01ee4300cdb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0367210be50d2426b6c9633ecaa35ef9aa9ce3185f4c80d4bc5228ef999b84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392401739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e09488d73754f7f8e221655f2e6176fc58f1591e2bbd4acd6202ed1e2f1d7c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392401737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108779bdbd0516006e477b38670519d434032d432de6175e851dcdb473be3eb5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79a88462211691cff9dd023f9140f2a39ddf53a15b21606d0149041d54560d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09889bbd2bff65129ad9f61933c5ee04ffe0f81bd67d9ec89354fc8b205bf0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862301386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbbe34cbd0dc722843f232a7496fd1f0a2cff54e378f8ce07a2b01ee4300cdb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd61d962d7c61795046260ba58c1e20d46c9f17c4134cd07991ae6d91c90d69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392401738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0367210be50d2426b6c9633ecaa35ef9aa9ce3185f4c80d4bc5228ef999b84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392401739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d66b3fd54d07859e211c110cb28614c609bf2e14d05643dfbdf3ebd5f23f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392401740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be30733a226753cc84245dea4550d39b43574d3b5a49b9b48ada7d258569cb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPD862201376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef453740761d604c2f73e91c1d2a586c20334b201f60b957ef4d503936a7be5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392402426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac8bd87f08502f061cdaa9e90ce1321884bd4ba01ee8c86e1b4226899c4c3a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392502973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cdcb4c8fab9e52b2982988b266aa34161ecb210069c6dd7f14ff1e97347b3a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392502967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcaa7ae8f7ec8946bee2c2bcea7997ab84dd07c4a496ed60c32f8de4e9bf2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPY392502969.