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 0xe1e8bcc25b16b7c065689a885578f7051e01956c0f9d3e4705863bf20cc401d8. 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/b68e9a94-2bb9-4be0-8ae6-677372309079.json and https://artists.proofprofile.net/proofs/artist/b68e9a94-2bb9-4be0-8ae6-677372309079.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 0xda1fd51018ea1794a109e463678d31b3cf4b3ae52ae63caefb66a3479734a660. 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/QZWFR2535991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7981417c7c98864acec66619e4866930ee6d8e17c6bb0a8200412051fce4b394. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFR2535992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9340c991516f912def3f4d67786fd212252a0a68ff0e280b481a0f4a9c11bdb. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFR2535993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9c307aba297ab62093f2873f4b8bdc887369edf7ea2a0502505baa61c5a254. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFR2535994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf915bca7810d6c628afec344d409bcee28c2ab5b5896c9d1c73cced2955caf97. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFR2535995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd87222b00cce029f9dcbf34a62c55b48446f9495232e19cb6fab34085baf8a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFR2535996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61abedab9a208f246e8e6add62b61f00a51f041e90614e4de3ee468e582e4ccd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFR2535999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab165cd39011d1b3868efd9c8b8964fecba3768acffdc7226baf16b071e5872d. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFR2536000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477e4a9bfc641a3f56e8039ef6b6d4221c05e8b5b679801448d0c1d2ff126d7. 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/QZWFV2513813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d3fd50649fe3dac76a7b9038826696c08a6578aac17d8ca305f3d7a715a5f. 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/QT6EB2500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fce23f188e64bce752accb14f087cbb30160f92ed4135cb26cd385d7eefa2f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT6EB2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0748c376de3015e4a19f6202825ea395d6e34052578f18c16b88fdc498c2ef. 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/QT6EB2556826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34fc3aeef3309cc45e0e8d3db8ff326068af06d3bf6edc41aa9dc689e0c0f3. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT6EB2556867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43b2a1e0f8c5c893f96a1930c0db6c8f6a46890b80096507d8f99b631028754. 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/QT6EF2592812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b21673038778de2a85607ca1861ef21d3775a31ddb42a51e7b44f67b812ad5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:41:42Z), 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/QT6EG2542652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca004a982f5ada68a020c536708cf255073a91b83057e379bbd7a19e11b065c9. 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/QT6EG2542656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5e82bcfd371e286ed3290f9037214be5ed1ee9ccea3ae0387a21311d65535a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT6EG2542654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a91876629c3bc67a85213529f3a7629afba34392c64a42779867774be733e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:35Z), 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/QT6EG2542667.