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 0x1f8d90a9a72d4c1aef8d64672b625c0ed61b05957d545deba05834f3cfd0b34c. 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/04c9119c-87f1-46f6-902f-30188720d499.json and https://artists.proofprofile.net/proofs/artist/04c9119c-87f1-46f6-902f-30188720d499.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 0x7d3f903a6bf07d7769da1c2798cc055f0cf50feb25d3ec19cd2559712d2c254d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM2PV1614594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b2115ba1c66e1672a537809a83c4c0159ed3595e03ea2cdea2205cee2c9edf. 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/UST8K1798213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9dcfe93ed2c3f0237033775f1f63a971a0bb1b6c528c4bfb122fbc806aeae. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:23Z), 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/UST8K1798217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf7230f40136239b881ef993d627bdbac3d7a4b81182c2e67aad37eaa949ef2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEA621702008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7992d24c50e5e3cf4f102db466f891ee91937e80a7e14b15dfe285f766456075. 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/DEA621702009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855cab917ae70ee963417454bfb91c3d47d3b6f847a54c4d864b2088d434b1ad. 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/DEA621702011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7204564debe41575932f86e91603730f9feaa9ebdc5f09ad6209dffa31557. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEA621900969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e04ec755fe3b0cafc16dba4dfb156c13bc7b1ddc048d990aea5e0d36fab84c. 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/DEA621900971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62291a469405b2dcb21b5b008d418b72883b9011b941a9c35d44a51b217c4f3b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEA621900998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cef59c48229da3ef90ef42ad4150c8f1e043c1b736d8578fd63314e21db2e9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:31:48Z), 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/DEA621900970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2dc74bba60a957f411858cb0c1ff301f5dc2b4581d631b4f8e350100bb6a03. 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/DEA621900978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa43cf64c4509202a9fdb4dbc906d6182d098c3e1ffedb30f80aff48b9976de. 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/DEA621900976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841cbb7112f041dde4de06e3bab88aa60cc310b9053bd11a85bdc7986ef82702. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEA621900973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3968bbab0909650c885f37b02f4c97dcd6c24bfb33a239dd96a20b43056b22f8. 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/DEA621900974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3162153a156f2617147a426ffb88cedd9b1b8a731ed2a05860d0776962adda75. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/DEA622101103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab376edaf899a158b80cedc236aae61aa5a3cd39589aff0a0f6bd1ed60c9b9bd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:48Z), 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/DEA622300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4321601e3a2faf2b59f6b327df07eb673c82060169a790873d4b82dfe05219f2. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/DEA622300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8583921308671935d93a6a1b1c9a4663c7a20e5217c9afa88f3e19de1735a02b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEA622300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8315964b7514e222fb7523e57d5eae3959222e1d38aa68975722615355b72dea. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:44Z), 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/DEA622303045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f9b312e67c85d9edcf336bb2be62854e7bef7d4c7acc27bdd6b79ad608fb51. 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/DEA622300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50b4d45e4fec6b34030588a42aa094e894951eac8b5724736e52f7283798e8d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:58Z), 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/DEA622300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de4f48bcad03bb38b4e2efbf0ab2d253f8f468f35f54da946fd57f973276a68. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/DEA622303046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619dfcefcbdfff592f4f86881ceff032af96fa94631df00c6fa4faa0bc1bc028. 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/DEA622300429.