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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749dce31edc4dc79847c00ac36539880d6d739ec4d5fddc8ef819ce028ffb1d3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddaf2fe6-ea33-464d-8fe8-97b45373c326.json and https://artists.proofprofile.net/proofs/artist/ddaf2fe6-ea33-464d-8fe8-97b45373c326.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4d36accdc47020f96780db0366568d40c38154deca6c05fe2d1b8c075a7321. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9M2237247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b087500790b9ff2979d94bd144e9df2ad6bb0b53b3bec1a95c6d1947e75975. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZW9M2237253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562ce0fe7683267fd9d54a7b7e821817e4d25e357b60a16e1cd798fcffcfcb66. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZW9M2237256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565d7bc80933d31dfd1866329625618efd4a7d8d83404ba95a68874954a93a86. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9M2237258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d4e4a237b8876fd5292e306de2541f589320e3b227be7368419deb7837dded. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZW9M2237261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4036530d12679b5e9d4effbb270c1a7a253597767d5954471690d81518457118. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0280602946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8a67a4f40e77f3a268500a60b8d14a5303c97b4663e9c2f7b76e89c9ac39e2. 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/TR0280602947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2c329805aba10a64516ace9691efb37f33957a44f26aa0a911fd8e2615ef83. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0280602954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282eac2e00f7e292a697be81648aa36ab6bc45563c16f94fa9efdfe8b42e153. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TR0280602957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1a01e5b4ab3c5058ec1e550b351e359dcf95acecb823d3b9397bb880ef1c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TR0280602959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19df5cd3af4a52c030adf7e337692f9d67c0e91d6461c747e5545fc0bff481b3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TR0280602948.
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 0x5d05c52fb6d57e36962aedd0b9b9f99c31d50769ada91b96014ef669c34d640e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TR0280602949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338ebfa098846a2acdf691c3ab1eb37aeafc8b038df2df491d5218131aca75a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TR0280602950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7373dbceaea1a7e59084e60deb9688e26459acbc43f15590f6c624e95af0a90b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TR0280602951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed32f8dd71447de598fceae42369e434d8c2f1c2d04a9b6d3957e66e79e8fea. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TR0280602952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f6902d85fd3b7e59018aade69083b13e2233378d5feb2b855cd6585e9e85f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TR0280602953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7417826396877259c6738ffd72e754a00357c9cf65bd42d4200712d43f8619be. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TR0280602955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb42c8d96eba6b98118d6d5a718af3d1226794d581033b0c952ace86f6774c9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TR0280602956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48407ba187bff653cb3964bc7839ec0ad1f7a11737a48b97d993b3ea8215b9f0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TR0280603720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2ae560be14702be070a65370fa34634c3a071fe5105399c01e015e78a22865. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TR0280603721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8e5e322d4dd74b2bfd53f7897164fabf29aa4cf939b769df8ea0c54f4fbf4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TR0280602958.