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 0x8c9f2bf881a5b020bdf971bfc1ea00256803358ccbee0187b49b62ba8d2ff183. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afc5a206-91db-404f-90d5-95e13399d882.json and https://artists.proofprofile.net/proofs/artist/afc5a206-91db-404f-90d5-95e13399d882.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 0xea4d171490ccf798a8dcbe5b4b0671fc028d724f6e6218265f3cbb6041e99f93. 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/KRB751426017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a2980f3c3fa21f996d9041381d9d3406946f56d5bab6cd8c9d3bb90e6b8603. 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/KRB751426018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79968b0d069808789231b84b44f27201ac3a1b29641d2419bff202e0250dcc07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRB751426019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95423b23fd50d8f7712e809d1f287fc1bc8286d4db5af204567ad809c456b6dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRB751426020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7600c8eb718f0cb2d19b23eb91eba119b26cb2815f4d7e0d72b49845b4de161b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRB751426022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8af65dc09a480aade3ea0f27340767ed03a33a439e77fcd8e1b11e9a9fd57d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/KRB751426023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4389c30611e3f3dbb0fa18d1787a6cfdd6cc16d58da06c9dd59f64dbfdc18c9. 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/KRB751426024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d6f1b0d5fcd4649b9dfd08d47bc4f97bacf31898a8ebf8cf243fea8ac9636f. 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/KRB751426027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed71d09fd983d801bda6c6a6a3a98add89f13956408665102f679d5eeedb816. 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/KRB751426028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35871df7d20fad5be0a2b9fecad10df6ae7624ab539307378fdf4f05b1b52fe0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRB751426029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2060a4f723ebf8c8ce32fb7faf8fa580dce4a86089046ed4fcab93afc40fa1. 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/KRB751426030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeec3fe3f5cb82ad4a64381598ad51585939e014a7fefc999b46feb5de8129c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRB751426031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254f0046cf7c443989f3e950879f1037e4bcc071ca0739a254953497fafe2ef7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRB751426036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443646d79a6fe1155f3240e12bd491feb475e4d6c3026ca42aa88548c0d35205. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRB751426021.
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 0x853378f32f0e39c776ca769ec148d2bae924a4f8673fb11d4fbb63adb322fb4b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/KRB751426025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf71e0dc577dce7b57ca042414dae26ffc6574cfb7acc592556f870131fcefd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/KRB751426026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b9e276c72c59d807a01c8fafdf26a532aed1c5c2d9ac34afdb9d3490769a3c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/KRB751426032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde080efbe0159ca4d5d5345a22d7c962390e84e1ec04e7f86f20a9e7334c6782. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/KRB751426033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1793013e3a62a4652dde5187a4f9a6793127125042940b0661d539859d50611c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/KRB751426034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f54fc2e560fa5e886680369015849e2799dfccb11bf8ecc5863f45f3ba2a27c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/KRB751426035.