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 0x29941f623a184c06173aba523e213e5ddb2e7e6e0bf82f81fa90bc03facecadb. 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/f71e598b-f73d-4abe-ac4d-c25c03e4ae0e.json and https://artists.proofprofile.net/proofs/artist/f71e598b-f73d-4abe-ac4d-c25c03e4ae0e.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 0x0398eb8b8e776ae601e5f4a2aa7e82d512173684ddda1f19dc78aa01e751eba1. 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/QMFMF2108054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82b4c54e5c2b4dc91114349febd63cfa528968bd73d62b4d78807439495e1ff. 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/QMFMF2108027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7addf12df31c919f029fb85a90011d9502176173f651f783fb2f53f5b155eb4a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFMF2108029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e368efd5b459439a2ef08f9424d4ae41e562d08ea9dd95e63326647629bd11. 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/QMFMF2109459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82e2a3d9516f3cca60fc22474d066cc77d17431ea846a3a29ee8bdfd262ab28. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QMFMF2110488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29d3c90d966f353683e0240ab90dab64dbe7c99e911ea07b594a42c45d8b3d6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMDA62101224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f872dbf0beface0c607923739f4806b0dab7d353792a0657b1afd05ff62afa. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QMDA62101822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54601d5dd25d24dff93f393b302a546dbb36d75e531ab4cd4059773a7197fa9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA62103249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389badedb8e6aa5140bbb951499a1098d79c5def366637ca17d1b84604ad0bf7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QMDA62106243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409a20a3e140b04e6d43d74ad7d9049a66acbed5763969d3f8f93e2b95b6def2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMDA62106204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dab3aedaf02036f4186eda9c8894cf98015303173ad50925ca53ff659d83201. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QMDA62126909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f8a8545c1bf12310671a3ea2aae63bbea3a4c3fa7fc68af151a20bd923e5e4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW2287580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8434f6196bd156b2f2c04d0a6b93ffde84229c5d7bd79e5eb1e1bb79548420. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:07:00Z), 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/QM4TW2287546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8644127a25c4755278456be833b4e56a664444e92a0db27ee7ef3763ac5ab6a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6MZ2292969.