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 0x992a0fd1d2479dfb2b7a233ee2b8678cc81d3535782e472f6982a974aa291bd7. 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/81fa0ad9-2fbb-4dd8-8a30-62f59fce3a25.json and https://artists.proofprofile.net/proofs/artist/81fa0ad9-2fbb-4dd8-8a30-62f59fce3a25.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 0xc47f1d7f9e64c08e101a726c24915c6ea272499e9652e660abaea6b392a9ddee. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ATN269501311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68389943b86ea3f49d042cd6d2818abfdaed2ae12e57db17b414f1ce532e31. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ATN269501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a1425155c2548d23b319065ddd50fc7aa8afde5eb4401a52dc9871c2d6bf4a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ATN269501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b75428b40dc505150f25e287189a46d654b8b735fb1d5fda95b8c9f3b811bf. 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/ATN269501004.
Through the Valley of the Frozen Kingdom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11683b75b8b5e9f7cd027dac2de4f98b5935c87d65a39ff01b5c74c33d729c7c. 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/ATN269501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060dc5955cc35a792ce9d033a2e4e971a88e68bbac09d046f55ce5e9494b58eb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ATN269501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee26fbc1898bb0629f4ec534c6115880b3657352827a7dd5a69d23748d1dcda4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ATN269501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba9f68af7c6bc1eeded1e8df8d356245d37202260aa6492a776499ee5a9efa. 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/ATN269501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768a8061ce7785cc1a80319a2ca6c2b6b7cbe25bc5aafabc7fac7696640038d0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ATN269501009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac80a58fb1c22ac482a05dee41209dff4a48c5b4e768ff90d9f98a4755cae03. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/ATN269501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114ae99b92f1a7c9cd27bb1d5ed4d62732a042723de9f68f0ebe06a1321ae357. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ATN269501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7420b0c1336bc393f88d346594b3e5ea2f50a241106b83b1408e3161912d3dd. 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/ATN269702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736eb599619208a18e1f66f184e7a5cf08d243a0cdeb326776550bafee3864ae. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ATN269702402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae3524ac2e6d9e149960523eccf67557ab97390b6cfeee62051f0aa132e47cf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ATN269702403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1968040b347ae8c5aa772e5b0693f820eced9be376e634de87ed27195feb13. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ATN269702405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4b8a5f17b4641fb42c0b96795184c6627fe8eef37fb69a36b6079d03da323. 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/ATN269702407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a0ef3eab5457ed830bfbde3b879bec065f0d2036fde6e4df738b01e223ced. 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/ATN269702408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2448e7149da92e52700567a58a04b10fdf4281185bb0db898e398edb624fc6d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ATN269702901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02198ac4a54ff9c22b1c2afd59c012460be986c60f89c3b26dcd4c81b1c3ddd7. 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/ATN269702902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f39377d992587d7220d238194b9c6fee699539787e05bb7c3d63cc6519f503. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ATN269702903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49127b904cf0f9a928b25f6462fb97f874baa1766ebbb373b7a513050a6115e2. 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/ATN269702904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49064f957d4357f8519de75ff966f06f6b8d8201b1bb1f03af8a7749ccc906. 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/ATN269906007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aea948ccadd1c8d1a299a2136d8fd0a99c05bf9876fdec821db584a6f97da8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ATN260109705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c07e583a9cf102650cc9a1139e464a9f9f5c3d665f022695f9457a0b10198b6. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ATN260311801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65493d5303ab421b39657b10bc353e85efebd9e37ebfd56cb3e36621ffd9c2e. 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/ATN260311802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14680c41a1374923ee1273717337f89c286132aa770aeacbd1e32619117e8f47. 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/ATN260618506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe327c2c75db06825e3ebc3551c0a0b9fa02617d7c002f8b105674135d61e41ed. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/ATN260618507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40b6b49f426371263213c3bd37fa5e869a08ab1ce6dcaeeaa353e6ec321363. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ATN261776705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe10467fecad4d2bd6adb58843e6b9a42876b311194e9356b1ef7d3cc52139f9. 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/ATN261776706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8538e83bb45c600bce4b4c72699e3103f1dedba8308d646f50d9a015acb1c1e. 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/ATN261776707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5489d64d4e462187940899b28f2f968ef0077cdef13c62f827927c064859fdfa. 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/ATN261776708.