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 0xe7b26e64c9e6fe4a97dd978f27a7fea665a09b1c7c6bcfaea7ab345506913ead. 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/458a4b10-34e3-4057-aba1-5d0d58606f1d.json and https://artists.proofprofile.net/proofs/artist/458a4b10-34e3-4057-aba1-5d0d58606f1d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Golijov: Dreams and Prayers of Isaac the Blind/Mozart: Klarinettenquintett KV 581
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 0xe994a29f10cf4621f281cb032e0eddffab1392d563efa9b1d27721d45f566a69. 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/GBAYC2102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6b45277a1d58be79866adfa172c946eeaf6f0771eb6b3a61812b8de9f0358f. 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/GBAYC2102731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e7256a183ee1909edf1853e31b8e08a6429e53d09d4d94b36d04334d4c46a5. 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/GBAYC2102732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6013e67ecf15c11f2f0c06f4a81b3c67a46b13a38b5183977207a27f78afa51c. 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/GBAYC2102733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3621f62857de3bda066a7651af618e8bfe20cd5d4353955f0441a17b471cb4. 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/GBAYC2102734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea1fdef2fc52ec7494175ea7fbcba9a20bcb6f42f3cd441e12c3a6cbceaac1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2102735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f248da45f9cad473b3ab08a813fcd1900cc5eb8f2e30852c627be380c5a67e. 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/GBAYC2102736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c5e2a345daa57bce7036cdbb74d478231aae8d236101a9330008001a712cf7. 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/GBAYC2102737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f5b5980adf070cf2a73fd44c6122b3d2420a5e0f683d9183cf6c58b4af690. 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/GBAYC2102738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9cb562a6e07bbd6c81add43e12b1fe053844f61e6e6caf9dfb123ed607355a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2102739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce8eecf223bd28445bec0cd92fb8c76187c7bc0bc4782869fc6af90f8244bb1. 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/GBAYC2102740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f8ddefd674d99cfd394730720f6d4b5596e391fefad000698e8f64d02f7400. 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/GBAYC2102741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16316e7d6337d90917eafd76a4ff03651ce71a359787b634ce388447b3eb4c6. 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/GBAYC2301831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46727c2f1d1d0a0769791e0443afb33cd13e8de1d41c54927f4b0f05052912f0. 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/GBPFW2400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998c2e72a0c5c5f0bf15bb53bc2e825ebf974be7e4035d85030a16c9b1bb6507. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBPFW2400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfcc14d65223ac15f2e3b8bd4786fb77ce39d954251e7fc941f843a4741d5d5. 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/GBPFW2400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a15263745dcd9be1148931e4ae1ea68c33d269f1f4b6584014be35b5203766. 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/GBPFW2400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9cdb7da91f662e4b234bff71ae1416ac85e2f9b0bd5621c1d2920a15d5fe12. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/GBPFW2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1608ab1edb93d962cfeb4c919b0d8d66ae317de1e8bf89858d8624ca892ca6f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBPFW2400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474c64301ccb47e199629cbe3e080ce7416ea0b56a427be5c566b33d47477a1. 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/GBPFW2400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2ea5d1aca94f1506c78f10ec979aa5af577f4fe18ec312a4d60ea9072cade. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBPFW2400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de28ab7ea6317f08334a5712ad9c000775955bce3b4c9a99f47701ecde5de0. 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/GBPFW2400293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4b80209afe0fee26447e9abecb124cd83c24d8f317d9dc103bbd439438169. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENJ11000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe994a29f10cf4621f281cb032e0eddffab1392d563efa9b1d27721d45f566a69. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBAYC2102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8dee4818ee20b6c587ce79062a0d634ebe2d5bce1e9ecf8a45a172ee231ee8. 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/DEE861100988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7998858d76365504c4ae55c13065927e3880d1249191ccd85a53f8a11b11d67. 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/DEE861100986.
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