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 0xbaee14e3f2074670aba9d895da749d315c169e7545de96f63886cbe1c274220e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbf5d3b4-7043-4801-9150-357635c5e0b8.json and https://artists.proofprofile.net/proofs/artist/cbf5d3b4-7043-4801-9150-357635c5e0b8.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 0x0248c7b9bf699d849dfbb21820cb60f6de7be2ea4ae3644f6c3b7038eb6a4dde. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:38Z), 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/QZDA81973183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83441b6e2235377fdd5433b58e4acd41f60cf47d6582d117004816421ffc2158. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZDA81972404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692842a67d705c0c644334322c6b6eeef6809a74ddd17412eb694ec21c854a6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:46Z), 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/QZDA81948635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620cdcf20bcc7916ed234e9bc891ba9f3c4f9d1aabaa75959dd046ded5e7b8b. 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/USDY41933870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f8ccbfb9d2b1faf462a3e98590b74911778cd790b61192da8aa7fe2472ae5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:03Z), 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/QZFYZ1990850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa289231fdaaa913972f069e458ebd915c3e5dd3130e76889e5c9a0360f29ba20. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ22002938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be963a53629bdfb2deab126b87cbbb27831124d526b6808d793527b3a165021. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZNWR2118243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e443beefc4164384b9d445ac6cff506669ff3be7e3e37d63b1b1356d09c7a8. 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/QZTB42240390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189b349e744cbbd3f3571044a0db6fbc18a432c0171ee0edae3f83e292101987. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ42281196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7af000d417d4920eab92092811efea22e3c3c3eca2f511a29063b3cc0d001. 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/QZTB42240395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493cb32643ef56027e3bbd23290e995e50c90b71d7fa862556cd84a5c19628db. 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/QZTB42240397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f244a8f6c9a70dbf48fb964e871e8971fc08ed6ac0a3e2d50ec7a49498fe28. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZTB42240391.
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 0x395268758acd9f2373fefe275cf94e557e23285573f85c0fd79a4538fcc9cc29. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB42240393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafebf0a7a3c90501903476f56cb5793d38a43894e4e52d0085020050de53bfe5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:55:10Z), 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/QZZ772453708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f13954045be85650c47471b181debb3a338186b68689546a80ea4ad6fca037. 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/QZMER2505034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc409f8e6c1d60128927ee643e732a3026d6b0ef60a71f6f8c35c41e4a9a68fdd. 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/QZMER2505035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cfef658220f897d7564b131a1e6aef0182809efbe384185fcffeaf72321691. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMER2505059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa347cb43bf06505ad62d1398a3e118bc692a96e77018fc215b85a02b82202890. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU7811961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370d0f5a0ce2ba1df2fa41441636d60ef43e6edeb25d22ab97a21579bf957b0. 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/QZBRF1888638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ecf4c759ac0f8164456401bd65aa56b14cf5ceeb87b5af6a5dfbc1fb4c039. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWZ2180915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce62eada5990d6a9c2157180542d7767f1b5698a653e949e3c35014e3ba0d485. 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/QZCE61849219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e80fdee74e0f8454e3dfbd22f557b9c326ad66de97aaac4901a869a1381b946. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7L2439628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93300dc51e8282090065c876c2df3e12dbfb8bcdfb1cf927471ff8e3d73d25ae. 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/QZZ7L2439640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173542ac8eb9c541e44e7d82904f94ce8cf0633d9b415a7a1f8e660a07fbac97. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZMEM2308249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e4ef5a068f06419a85560a8d0e6b33e96fa411ff9990a4afdbc89629cc2035. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZMEM2308250.