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 0x8fe1d6665f218f5b76cf29d03d137ff50f50d50e6a99978a4c67bd76652a5391. 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/86e4518f-0406-4af8-af82-ec23a03c5aa5.json and https://artists.proofprofile.net/proofs/artist/86e4518f-0406-4af8-af82-ec23a03c5aa5.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 0x4d238974b4b0aa15e98a6df2895ca388a3f7f77bb1f7c5b39629a9de901f8aa5. 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/QZEWT2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f862e527e3233a07bfbbf601c2e8741ad7e0f048c6440d9dea17c4b5ceed84e. 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/QZEWT2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e364b804aaa33eecf4a916e2bbc26e992bcc4226b59582f42f738e52558480. 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/QZMEP2242041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba866b1cdb98204e683b88af7cd8b86352c783af8df68ee99ebaf0cc28d67ba. 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/QZMEP2242042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4611a86f959a9747b3d28f9daa6a45eb6caa00c9ec07650b66a17e1f031a708. 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/QZMEP2242043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c00dfea8bb432b497d636620c5ecc6dbe7a03793bbd3880e4a221975a52d3. 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/QZNWX2111917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b7a7c05d98782fa69c003cc26c045c08bd52d2c07ee45f2c4c41d61007a73. 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/QZNWU2170593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb129a69e3eabdb221088d3a241874464b75d0ddc710a40185831d3f2ba96384f. 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/QZK6P2106745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a7ff52ce8778eaec69c48544fb0b14b0d78413c33f23c558794e769bf38adb. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZK6Q2143472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f96ca0637595bf5a0e8771922f3097d9436d1a524104b680c3b84c011904996. 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/QZHNC2143277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a7ff52ce8778eaec69c48544fb0b14b0d78413c33f23c558794e769bf38adb. 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/QZK6Q2143472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e5bf006c4030430698194fb1cd530fa588d7ca93990e442d1631d2fa30803. 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/QZEWT2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ada6ce5516425760ff6209fb747ff1d69da0bb90991aabe52b3030243c757. 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/QZEWT2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db58075210dec35407908cd4ac4cc7ff0b18a72e24d01a6ba3d1640c4909b5. 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/QZEWT2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b09a9c472c83d28682f28540ba6666cd78fb05e0030cdb07cbcc2221bfb8d. 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/QZEWT2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30570936ab9afe1c4b45bd14623433855bb2ee44d74a2df8fdd102ad16fac04. 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/QZEWT2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4985e98d0d8e9b1c360175170e9df5c5c9bc1b032ee18303a0643611a459b9a7. 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/QZEWT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eae72764bbdc81111a1883e7e03c7a831dc26b4213ec21dedd7997badcfcad7. 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/QZEWT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff98c587ccb5b704e8952304958dc19edfdb44f0d3a7d722e705d02f3617028. 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/QZEWT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b824794650ea3fcc320432cf88658280fb0cce2d150c2d087f9b60db7a931f5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZMEM2276258.
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