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 0x16736fc54e7443afe0ad39c6223d6d9920e44f8f42dce0a18eacc3565ddf813d. 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/a35dfaf9-7645-479b-818e-b5599d07adc2.json and https://artists.proofprofile.net/proofs/artist/a35dfaf9-7645-479b-818e-b5599d07adc2.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 0xae3febbb47f5611e0aa73b943238e48f91d63e80848a53994dd9e921afae3b42. 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/SE5BU1736114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d958555d46d105f0d9430b698eb91c9551af43bbe4df9a758e45de553d542b6. 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/SE5BU1728966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3febbb47f5611e0aa73b943238e48f91d63e80848a53994dd9e921afae3b42. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5BU1736114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d958555d46d105f0d9430b698eb91c9551af43bbe4df9a758e45de553d542b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5BU1728966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb44f70a95f284ef60a27011c0ab8c40a15cbb84984a170e4d6339c7fa587e19. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5BU1772531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58303a46b7a3e66e424542277ab033d130eb1a67ec8bdbc10e0f8933af591c2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5BU1750750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c8821131c7c201a4b6af80cb8413f430f38acbd7e93dbcc5c3e41e6b5639b4. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/SE5BU1795282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62a0e29d939249566dc3f30db0d930c5ee61e13d7c5e3483c4d5636039daf4. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/SE5BU1715007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302e8ff6024f164e1834b1dc1503f983be60f211bd980f23133882dc56c356bd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE5751892142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97630a3319c6b60c65946aaac4be9cc24e571cb712854ba96acbf34dab4a3147. 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/SE6A91984007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97630a3319c6b60c65946aaac4be9cc24e571cb712854ba96acbf34dab4a3147. 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/SE6A91984007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418497ddcd439ce66dda4441534d50d18bd7a1c8166d0cddcb19a22a5b40a881. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/SE6A91983880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87642426eaf778baea0c6daf0b2f194cc9c6aef5e56e116b2017bba169451a55. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE6I31960871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc0b39d4fb7218f06c164530bf2d0d3901aa7b70879828ac8ce2a92a38135a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6QE2272433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e98ee298128112a5a38a8eaba6baa8b5ffa53bb3884e914ba75e099819dc62. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:46Z), 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/SE6QE2272434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ec7d208f1021e2b81b3128da7159ced10152a76298b7890fcb6bac2f0929c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2339496.