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 0x02c63b728d940c3f9d85b17cdea56cfd378d6c497495255305260df095236c8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a836151-71af-4cea-be24-fb9c816e8481.json and https://artists.proofprofile.net/proofs/artist/9a836151-71af-4cea-be24-fb9c816e8481.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 0x35cfdb72e496bb53ce8584eabe27eff3b337f236ab2cc6a23db7692ab3195a19. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGWW2071012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ed19fb58ee3a432334cfa8a335bf826c466b31d259f0bcc2c0b315340cab8. 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/QZTAU2109606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4455802b0af9bbfe50c5878cb5c49c023ea540339141a9daebb4c9c5cce9ea9. 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/QZTAU2109609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57aac91858ddbfd88be59b6e9ee69bc16480dfe92c9a318387b47790176347f. 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/QZK6K2290013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e1466634277655afe814ff3ddb69f206c0d12c45a771675b160b7559aee4c0. 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/QZTBA2322197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bc25b3690ac4649dada098d423d9b92c6a943b638926579bd8aebc8e5fc46a. 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/QZWFL2385728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a01e69792591eac538cb8f186f3e6f60879606903136ddc5c7376c7c13233b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFL2385729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6dc23cbfa030908023b2114352b0f3d2a4098d81ad202d7a9061caa6c6e8e8. 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/QZWFH2351728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f9d733aefd85dc9357890d07f282dcfb345dbe86142614d4bd349a4236636. 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/QZWFL2385730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a68b193f40b95bdc4acf8460c5349c05c5bb69cacf3c2ef3c8f49aec2ddaf8. 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/QZWFL2385731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da0368b4a13a74abc2a74fef5d854b25296dd1b4a9868eb11a4d15bc696bcc. 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/QZWFL2385732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af6a03fee04470f53e9c133ba1efc6b0b32fde2536ce1d026ed913ada14872. 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/QZWFL2385736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc240c3f4a119c9d7a88522eeb44ff44a2a51047598f6ed36ec65d9887403583. 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/QZWFL2385737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7310b5d178268279d5a0b5fbb528c99456f3e15b8830a2eb457ed9b37d02ef6f. 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/QZWFL2385738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8028f9937856cab61a59bfca0b3b3f962e23c22c321c2f29225404ed78a0dbfa. 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/QZWFL2385739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c8fbe3342390aa090de849f0a4f13918cd9bfb838737c37fed9ff6f7e81bc. 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/QZWFL2385740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f602307ccc940778ce314cbfb70e88a174e9d88af1aa9ad189128af7968e8a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFL2385727.
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 0xd20d963e499cad0ab6b120bd4a6158b2430c7f5d0d018337c482718b4a55e95f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZWFL2385733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0471d740a66d71e4dac2f25d0d7c67c267bc771057ad85e00cab4aa9e9fa15. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZWFL2385734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9487301a0d3922674f889bb5b967f19656416c4259830911afd797974b07bf09. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFL2385735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb455df471a002a999fef002bb894fd58399d69016c83d655c4a91680a470b6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:38:41Z), 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/QZMEP2471256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3b5e30d8ef46d0a30084e58fdb98079356c3b026d156edffa110308e6a0b86. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTAU2470619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf29ba9cc6b0280268f9375684ce14c2afe3edfd5e5d63a7700c7bee863d168. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB32560021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154254f930461c66f6bb81d334da65ba4034e323e6f6daadc95e905019b4bf2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7L2568388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ba353903d1a4e21ad0138542357826c4bc625ea19e1cdc6264f8cb109e64a6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ7L2568390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f3e678ffe80d8251b096aea474bb2f126190f46c3ce8ee204d9f3efc606f32. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7L2568391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c2a66a2b26db2a0136dee498e6c699cdc7ce50870730b17e0052610747071. 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/QZZ7L2568392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf756fc74ca95018a8cc767bde29a6a03e6ddad4536544270c31d5be052f349f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7L2568393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c81df278e64f2a8a7fa5971732749c78e0f4f68a71276bc094423aac5b2a6e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7L2568394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1972b3623147242b5e97f18b8da71d7f974f78447aae7b39c74b09c452a6fa0a. 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/QZZ7L2568395.