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 0x1ac02d9c32a73e421b9a4a183ab61efed2d6b3172684662ce94944afe0755485. 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/7884e904-9bda-4482-911e-1dfdc27567dd.json and https://artists.proofprofile.net/proofs/artist/7884e904-9bda-4482-911e-1dfdc27567dd.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 0xfc7ea7d48358fca4c9b395e5057d6d95d994b008e6a31989852bcea0600526e6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWDE2333856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6187b087713619e4399b9e785f2f1eac5c3f9ae33cc85743739451b90ca392e7. 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/QZ5AB1979905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056b1de93cb7e245ecb6463b08652be4d0316080b11f74d8b1ba363870b46546. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX6Y62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87ecf1d16f4540b0b04c438fdbbf9ad46133c748cae2199604e8a5f0be4db60. 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/QZTRX2101609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a03aed7162ceb15114b965bc5d5ba3a26b2ad69a145f88cf4595731cd4db094. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKSUV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cab73f9c003d0fb34b3c00b6122e03a5ec2107715d28e26c289c6ca4b040cc. 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/QZZ8A2320301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c5ef158a2b1aaa47ce7d704f2e9b3676df31433940b37fcb58c253b2499899. 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/QZWDE2333843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772678e5fada475ece07d391f03172f8d58d66169fd2ebcd6cbf288bee8f12a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBRKQ2222173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175ca898124fb6071daf8849c23c9f535ecfa2368993a0699669545773e07083. 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/GBRKQ2222198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192ff8460700aebf9b418989ce20a047c29464490f0a87d05d917e8fd24fb810. 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/QZWDE2333839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06eae77ea4c21c065ad02f20cc0e1748ff7dce97755d73ce57c34cb57e551b9. 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/GBWUL2350290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88470b43394a083509c3a18b27ace89df149f0881b85cd2c626013155099ebcd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZ5FN2372155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ccf0deb3f04eb58dbdfad5d42067861256ae981038ffc56139e84cf0198c88. 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/BC8CR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6044964db083c8e2565b7444ec40b0ee91210327e8434bdc6ef210efdce0ce45. 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/BCDPN2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb72946c72efaf765fa4d91db95c45dfd57a9429e9a305b67a0653ca779624. 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/QZWDE2333848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefdba8ff6f9dcbbd6e47a04d8edfab10c5356e26689ec3fa9ffe9bf52334bdc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRUM72400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23d9e3af2b5d03d202693ac352bff7e942b24715b1e5a0f5acadb2dc336763a. 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/USLZJ2337212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458399c33231369c76ecb744051ca80de162deb99894cfc4e75b47144610faed. 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/BCDMP2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e8a651bc22ad9fc07b99bd25ceb8a9eada2486b27d5fbd5fd06543c686758. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BX4RG2100007.
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