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 0x3a422048974c37782b5bb6103d0aec0f077ecc9330c72f21792744cba7f55245. 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/bfbf79d4-e6ce-4ebc-9ac0-8d6d1ce1ee21.json and https://artists.proofprofile.net/proofs/artist/bfbf79d4-e6ce-4ebc-9ac0-8d6d1ce1ee21.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 0xb3d07ba930d360d099bb65a5f97e0cb99c8bd8c56f47290225097e3d08977a88. 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/INS182302085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f20f4a04e39be94a734f9cbca9c4599c0c3be3d00ef7e8c3c5e7daad91903. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182402038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc218a5bc7e1ad5f4ae12611ee948c300b23ce48404178d9fc28f9aa4eccb8b. 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/INM432400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8d5d338ce568f88e31af1ffe30b00250ede3fbddcb620aff9504c5ab2557a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182401079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6680f7f636c7f8f522b79d056ee1e31cc3a4cdcb6fa2e3b79b25bfef7f590. 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/INS182303454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f623313148b1256ed1ced3e11f4ad231b8cc4ef79e881496485905789a0c2ef. 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/INS182302434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf47b20f97c85709a1113a3a16b265f96a58914d960f99bb816c0f5b99f30eb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS182301531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739e7f3064284aa2a076586ac46c09348baca4d55a70c0304aec8b3a680be19. 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/INS182300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee84e63f5518c6689893ad31928bb445d7f5acc4f01ba6bcef9e5e63327df1. 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/INS182203942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983da8ba14aa82ab2fcc5597719fede3c794540a42b7294c5f13426c9323dc9. 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/INUM72200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fddb375bc0d87aeb9b15388bcd39930d5bbd6d9726bf23f558fbe78edb3eb7. 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/INS182203328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17188ad429b54b889e4d51bf7cb8b7e894e6f63900b7fd25eab2c831b9a78c5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/INT132200755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357d2528e86c9d21a90ca308b42399f1bbb582f653dcb3a22c82e441a795495f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS182202224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd6cf331bf7ed5677421420f9d0ff0408ab849d8473c956569859382ff14ca. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182201223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370a9e9576bbcf63befb9a3612ae688656aa9679a7c75128b0dc3dd0c9529ca6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INS182200800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec2d1f91cf2a13de0fd81ffb0c48a35bc6c668cbf339a4a821552e3e155453. 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/INS182200464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcc05d1ae16dcc977e2119af6524badfa5fa7bace7fbc384083961b21b3b087. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182200215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7a9f8fc0b142a1cfac864cbb207ea52b342a3086826338807dc4eb2caab0de. 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/INUM72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb393a5f01c73d801e609625acfde81fc3bcfc3143ccf3f3bddcfdef81f2c6283. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182116319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98230815870736c7cf69afc3db6119cb62f23126e4f1f6df906a437a8100d7c6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INUM72100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383afbf4ff86684b49443a3cb4611a2cc24e3bf4455f7fec9a97e8b68c99763a. 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/INS182109486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07880c067a210a5ffef125c041c547526c4421b0e8c831f1d8a8a7e18b0fd7. 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/FRX762102197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7db329e8dca01c3e0d4b0aba48cfd20220717b274e9634bf38aa54314bfa50e. 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/INS182101086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b9c18a100e1b50445de801ff5cfbaac5fe05c5780218c82806c8fdaf9f4186. 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/INS182100211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfcc77d966e88dc6d0c02e3493e0a02d292e0fca832e5ba0eaa30512db6859c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182007042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4afc916b7243a761f1edc80207833ad256339675f72b4cb4acf2f29e83b0e9a. 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/INS182000888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2f2809431a03aa88fa608a10ffb44d01ee14d9a1d8a65fcda00fb9940b4893. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS181905121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06990a5e0cf2e9025bdb9b5491a7d340fd7e333888ebdd75c851bf0c20f35718. 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/INS181900533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb707b3eec6284fa60b27def37d35dd7f81a19b999f134c54607623129487d77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS181900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c3083770ec81c0bb255ec4a5c79b4cdc888b39ce0fcef3004b8678e250dda. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/INS181900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b77a79cd5ed8cb74aa62857c2be56e51b400b22f612e935730a2051873e79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INS181900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c71f9f88ea106dee9aa54574876e91ffb4d3c6d3f040205ec3d9e72825b2391. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/INS181802950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db878e704f9216dc8b73b417f3a9df8b10559fb3b87897891616ec496067260. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INS181802841.