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 0x319e21e6c548223b85654f660738f8317f8c01a0fb52caef5200de4999082022. 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/a220da3f-ed23-4f36-89d7-2508b69348bb.json and https://artists.proofprofile.net/proofs/artist/a220da3f-ed23-4f36-89d7-2508b69348bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Joyas Musicales: Romance Con Rondalla, Vol. 3
Joyas Musicales: Romance Con Rondalla, Vol. 1
Carmela y Rafael con La Rondalla Mexicana del Chato Franco
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 0x84217cc0dc30100e642700129e50beea4d6e80caf9086ba6c840212c70b16cf4. 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/USC4R2328642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674a598c5656610e6674903ebd38233a234ff2f6bcae9c1e85ffe0f603d77c3. 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/USC4R2328643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66f1d8f62af3257de53f4f3419842f15795d30e728b53e95fa791a8fe339be. 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/USC4R2328644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ec45c8187c86e81d278a5a6b8f78cf0843337157285f3675638ed28ce4159. 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/USC4R2328645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceedff13ee92668fdcd1435a2abe2ef5d728b4b61a54b92fdd70860a76bdd4c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:10Z), 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/USC4R2328646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb08ca6999f23d4a6ba7822ba4caa4354463f47d415ffd044c867ae202bcfade. 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/USC4R2328647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b909e79928928fdeea1af9ae747929bc36508132478cc8687b7bc0dafea4cf. 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/USC4R2328649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d66a38d34a44e93b7582dc45dc80f69bb5ac3f76d6bd7eb0179553c3c4c3912. 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/USC4R2328650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071d28496613fb1d34483f33566c73afa0fe7278652cc6023bdae492d10661e8. 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/USC4R2328651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fba9f8b97ac0d11063756aa0d3a09735b98e296214f794d30d9800153aa3e90. 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/USC4R2328652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25ddcad8f5125d266fe4cfc9b6fb03a2d3b83691a0bba8da7f06f327b43044. 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/MXF366914844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cf4837e3ca1c74f61032cf057a50f2d3a31c0a4983d506b972ca2525bde636. 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/MXF366914850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60075c60c26443c5e9537ee59296c6a99e8ee58cb1480d42e33e92d40afecaa. 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/MXF366914847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80012acbc3e69f10251939d14506a23cb3a2c7def0491dccca9ed57235b82d5f. 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/MXF366914846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd088afc9d0a23eca158d14530a4a32cd5347516fa75607dc4530ce3bbdf4d2e3. 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/MXF366914887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad4a21e76a41a5ced774e78c7aac329ecf57e3e54159cd9c1fc4d141d22b2aa. 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/MXF366914845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ca6169bda763bce480595a19c0f87cdfd24ac601b87c1805a57f3f6e593365. 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/MXF366914848.
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 0x32ca3ddeeac9cc8415a2ad250ec9588db5e5ea6fbbb81f660883ff762e01ce9f. 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/USC4R2328641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac07269cc57eb05fa63a95821590816654aade813410830a5379e07781b64597. 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/USC4R2328648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10699526d4a6ef848744a56906d7972db5b55304751a8f5ffd824250138d197f. 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/MXF366914849.