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 0x2241f4457d33f123e155c8c32d054be8a4feae2a0c8e9713fd4f2cfbc48c2aaa. 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/40a49a55-d59e-4efa-b635-357850cfcfe1.json and https://artists.proofprofile.net/proofs/artist/40a49a55-d59e-4efa-b635-357850cfcfe1.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 0x0e299cf0891936ec06de52808380929ce563a983f306e2d99e3a9697574267bc. 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/USA2P1531366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6adf391b18e67d8a4c28b20b386b832caf9efc8837ff1d88c62f0f13af3465. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USA2P1531367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea0d89b930e4c17cd82d3e1137a1793d777d17f3817da93639eaf75525daf35. 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/USA2P1531368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edb1854aaba06d0fb68b710f6368aaa49d00bdfa709476a7612b21c1c150c2d. 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/USA2P1531369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b225da1082528cfe02b77c51e9d4e4cb0f1a230747dd5078dff2625250af9. 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/USA2P1531370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037df455d299fd5474765b455d7dd3e4c6da4c7b932f28732b49685720aa520f. 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/USA2P1531371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9df4678a8cf8fb80418309464e3d3536425cc4134f2ebc3377a63f0048bda91. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USA2P1531372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244de7267a3f14dbde8e788c1ca581361a171ec334d3b3722f6a0a457f53f893. 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/USA2P1531373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9babccb5671f7bfc7f2faeffb3bafb9f6509addc26ef95b78a08b77143128780. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P1531374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a303e17d6f2b6d53a989c11fefe5a945718d6930bf85184dea4cdaad8518262. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P1531375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc44b77542ae256a47cf7d77791868c37a3e3beee752ee5a1bcc8a13f1f434b. 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/USX9P1212779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0a26983fce84f39403a5f1fd1e4244687c4f245fb2d3d48fc240446c256e01. 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/USX9P1212780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3daeedbcec39bfb8e042673d14f6930e8402b0cbf65045ad491139c836fc3d. 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/USX9P1212781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb93aef3d3f77c6a415d9b757d0095d1870aab6a7066af47aae750034f0d8dd. 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/USX9P1212782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e765277ab5ac9564021ebfaed4a252258d9b4dda259a91dbe491e68756b02c1. 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/USX9P1212783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd12258bc3104a7071205d0e7caebad08cd3da72b7f9c96847b16a0825babf30. 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/USX9P1212784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3921129355c27576713b8dd104a04bbddeb1387259dc26db552ec691442cf8ee. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USX9P1212785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe544d792eda4b5c1876b6c1dfe365dd991f68cabb6186712cb9c671ced4c6739. 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/USX9P1212786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ef3ff00224b317dd6fdb642d93a009099f2a42e94b77b1c4954ff6fc8b652. 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/QZHNA2341478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725350a0936828d31fd23a7cf15c9e361c809a621942e818cee2ddda0e5df7a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZRP52235469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1a9e6fa9729da0d3b38b620b84f33267398e278160366ace261c23cb6e681. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYY2281065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5eaf416c5271be390cd4d4086204611a9adf9e31c45f00782205c0eb7a2adf. 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/QZHN42083227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f7c615eaaa270db3be2f9a680816c62a9bd222bc401a40d61fc4454013b148. 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/QZK6P1969745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9c04a3a837c21b95fd7564d2b08c3e906ab06f44893899ef33ad1aa6ceb0bb. 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/QZFYX1999909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c731a5315fa6b6c187d4255da89baec04282580ce4a96cb6e0a7094d781057d. 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/QM2PV1822105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6759d70200e34cdf801880d04d8851d3c2aa78be56d4586835bfba1c905a0cf7. 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/QZCE61811794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc5e91004c4937612e92fadb5b96fbb5eb50ff7a0feeb87ff99fc9d9128037. 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/QZANL1743505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d23f60ea8735b574d06cf51c8e2fee0b0abe953e83d1e10f113e329243b2c7e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZ9JZ1703391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cacfea3ebf9722fe36d09aff37ab81dada35b9ce88184c0cc3774ce5b693fc. 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/USA2P1506368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc481806b40e2d40f68f0f8bbe8a9ba50c5158e5a09525176d0bfee30d03f1530. 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/USA2P1506369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d42a50beb08374f7f87172cdcb56189870ab49e70b689f20bb23561eb7d34. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USA2P1506370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ee7c3ec4267c285cc242fdd3eab0ff65f1b8b0fb702a7c4b7d7074d8f1130. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1506371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e85110a44f8bdb31ef22d640424c2aace32009ef5b7f6397064a29c192a604. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAU2368390.