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 0x826043281e8f6f97c9e11d76faf3d925c79e0b3d5fc2de58c71d358cdff1c841. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa22756-36ac-407a-becc-bebd87466f41.json and https://artists.proofprofile.net/proofs/artist/7aa22756-36ac-407a-becc-bebd87466f41.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 0x0e4ad9a6aa0c14a3521134ac4597351cf0d0cce49eabbea95cff29eed281d07a. 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/MXF367824966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dae8977ceeb337761a35fdb4ee7650e360139c4edce62502113eb8d56bbbe8. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/MXF367824965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc644d43d7cced519655067bd10e224a4b3566c6e1dad0be651c307b2308749. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MXF368038989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a6a8096f29b2d917fcf62937ce10a3d2680e3c608c132d15c6415d1c7f9a49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXF368038988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34748bd0cc48b40116d165953e957c3d0aa43db360d807bcc9ef243db49da4a8. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/MXF368038984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd48212ede2694ab9414007438cda4f8a7eb0f2104caa8b7d89cc4190be717f1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/MXF368038980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03a68f1507ff84b6eb3a6eda1f493690d9a43ac4b21e05fc95fdfa61e5c554e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/MXF368038981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a18dda84efce876028420aa54f97ec5e44563f7e36d44bfeb4e6e65267fa53d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:38Z), 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/MXF368238962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb8f4677a35b8ba3de70e0176550255f32a7966d7f8dfc248a56e6ea58ce406. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF368238956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1afc0225654d2d3d70fddfbc55bc6e088ce8d3842a3de2365b17374897f75b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/MXF368238954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b25f0d92abb2519e4b44ab87691902b4e50f5e10b7999fd221574b3d502d8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM6P41889024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3224fda852b717f0dde31eebfeea9298dd781b11f5d39ca5593eab98f1618c21. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF368039018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69981d409069ec28e74fef5d3076919891c6ae9ee18b83d5b2a59449a8277811. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6DC1745151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b1fb2a269b32ba0da3aa2bf8929d129e25bce19fe5e2de84234a8403c853dd. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USJ3V1825496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bc74f15993d7c339307bb930af80220439c76b935fff2b919a66a1d6c80b3. 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/QZDQH2419504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3571455ec3dabf79557409337bf9740e5dc022604f5ed33bb698fc644e665f. 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/QZDQH2419576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb41e114108ed98dad6887dc307b093aa10057790f26f8e6fb01841dcbbc4b8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZDQH2419577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d5fdac84dad7b5b920246034abdc6b4f38a302f73f5c6adbb41ebeb754aa3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDQH2419497.
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 0x1e0cd93e08c76c0cb49dbf5e1b141446b0b57c14800cbfbc535a1f38b773f0f5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZDQH2419501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550249daed21467f7254eb3624ca46653f78291ee61e1d998eab09cd2005e60a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDQH2419579.