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 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 0xd0df05af24c9d44b3a2faedc36de109fd478f4b4a972692bda9ea6e887be83fa. 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/5b2f6e37-0041-41bb-992a-a247b3c68f32.json and https://artists.proofprofile.net/proofs/artist/5b2f6e37-0041-41bb-992a-a247b3c68f32.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 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 0xe30e1a021d8536c6d2465314dca23b2343d83ad28c6904795e8a6532515c1cbe. 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/TCABG1275645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db455d6f6b73d5ec234a4dbc983b5673e3959e2d47ed23ed7f315a06b234b55. 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/TCABF1236858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5aaae4ce13218300d3c66baa3f22855e0746572e68825f410710d688c5de8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCABL1374357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f727a91a9ed3b21f8edb8f21a486f72ce235669a60f86494cf36f8ec9fcd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCABG1276001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5351c56a9c79330c2d4ab8cd826df0b35f0eeab9ffa66bbcb7ed8142274d9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCABG1275659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5aaae4ce13218300d3c66baa3f22855e0746572e68825f410710d688c5de8. 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/TCABL1374357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5aaae4ce13218300d3c66baa3f22855e0746572e68825f410710d688c5de8. 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/TCABL1374357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8066d22d6345c6cb378d24a29e390c56d6711e7d3bf2a96631b56bf8a8d14f. 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/TCABG1223456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e77df55f1f33d47f95fffd09a9a1d9b9b1db7e75df8a46cc593c03772e6f6a. 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/CA6D21000357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a4a5e1ca483f81f0cf599928e2497adc71a078698665bfa386b2eab976691. 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/TCABS1341023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b5aaae4ce13218300d3c66baa3f22855e0746572e68825f410710d688c5de8. 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/TCABL1374357.
Monstercat - Best of Electronic Music Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8066d22d6345c6cb378d24a29e390c56d6711e7d3bf2a96631b56bf8a8d14f. 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/TCABG1223456.
Monstercat - Best of DnB & Drumstep Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f727a91a9ed3b21f8edb8f21a486f72ce235669a60f86494cf36f8ec9fcd5. 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/TCABG1276001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801b0a986198070c2ec86f5a94c0c48de9785881578ff28b3f49bd262977ee36. 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/CA6D21400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30e1a021d8536c6d2465314dca23b2343d83ad28c6904795e8a6532515c1cbe. 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/TCABG1275645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5351c56a9c79330c2d4ab8cd826df0b35f0eeab9ffa66bbcb7ed8142274d9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCABG1275659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a4a5e1ca483f81f0cf599928e2497adc71a078698665bfa386b2eab976691. 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/TCABS1341023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245f8182e9abbdf263c4bc2f9ea1503e291eb326fde3aaff06ba249c9cad47f. 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/TCABU1435536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc42bf15c3ffaa6cc203e52640dbe3fedeed9494cb8ca476225dbb48fcd2594. 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/TCABC1177226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245f8182e9abbdf263c4bc2f9ea1503e291eb326fde3aaff06ba249c9cad47f. 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/TCABU1435536.