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 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 0xb515e28c3863466b7873b90b94f21541e410c6ab62b6eb824f422ef8d2943c1b. 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/4166f62f-f92b-4edc-b8c1-d16d131fb7a4.json and https://artists.proofprofile.net/proofs/artist/4166f62f-f92b-4edc-b8c1-d16d131fb7a4.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 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 0x2c607f14b8d2046fe8eefc60746b4bd831d4a7ab8f44fabe04ae77d77435ae36. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/IDA601700319.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b61314c9b26fed880abc5fddb2cab9b58e3e0c247f1ac44257639f52b5b4c1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/IDA601700483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768cbe549a49334ef23aa3a7bc00515aac7ec8f8d21b19ccc590405373a62161. 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/IDA601700485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3be7f1081466b92786f5ab0262f20aea70f3acd35308a78a8aadfc0a918f60. 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/IDA601700487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94c33cbc65f71dab4eb276c7629fb0d6d2ad5d998c4088f683b3b729bf0fa36. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/IDA601700491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8e163f238ec90e6d1d6d1ff54df4a6bb3391c2c8955aef6d71c7cfc4b07f0b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/FR59R2550215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34b71841889938555314988775559a98a687578ea8c3534246c77a70c82c3fe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IDA601900939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8528e98ce7cbaf2e3c96da572f3a21d14ccbd0a99079b9ef73923f6b6095d0a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/IDA601901428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9052cbabbf25bf83fed5453760e253b8611eb5be1a8553f3ec3bf13698e86d2. 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/IDA601901585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45d90d6b3442199c53e87963f75024ef94259dac35e40ccd44bb09f8a8b4b97. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IDA601901665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76f24fa46f301d071f870903611f850e2e894bf3a2ca56ccc05bd8ca37c28c. 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/IDA601901885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fd2d71cd7785ff4e3221cebbd597ad09aaf02dfb6ff8340c2d9e85483905c6. 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/IDA601902033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d4d13ba990bf3a24d2871865f7e06756351adfb544f715d78266965e6f046. 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/IDA601902102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eee031092339043c30252b9a1ec9297eab74dcf704fb545d2ff8ee10dfac42b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/IDA601902112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280f5912e0304dd91a3e8b57353f40f64b5fca4c5fbf2a84942979631a36604b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/IDA601902471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca842947e145fffb17a51878eec50f8a595dcb0a8fe8f0e2a13ef67ff4d154a. 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/IDA602300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db96b5cc0fcb7562ad1bb7df90ef1e54709a75c886aa38c6cec6d854b9d7a51. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/IDA602300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f20b5a6995deee56c77372a27ff4c12c48111c34994ab8f238f4b76842c13b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA602300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5e4b614271e6a9d0d9c8205ec09997aeaf4052b2ba60b315cce251d91f5d24. 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/DGA0L2347788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c18cad422dbaee99be3f875630cb2bb8a45824eaf56bb13e8e740e31d46aa9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/IDA602300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97e5593d45562a481b62b6e40c4095162780a7e693f718630f39b87d1601fc3. 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/IDA602300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fac212e7124a22dd0c9c4aec2d8647fe8dedc95e072040a9cb3f1fdf199ead. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DGA092428656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a230f4ca2a5d9b76a26a9ca0fe7e2a2fad4a755603cc22285aeb023d214051. 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/ING212401174.