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 0x4af3ef1984549f0a9c867ff8e62729d79f2e71f971b493433e68214f6ea06698. 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/1feb1d0e-10cf-438d-bfbc-8d67b2d398d6.json and https://artists.proofprofile.net/proofs/artist/1feb1d0e-10cf-438d-bfbc-8d67b2d398d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dueles Tan Bien (Donovan's Playground Remix)
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 0x4b364445d82cb6c3f1d14f5f1d54df35821d8cde261ae88299de5421eacede51. 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/ZZOPM2240224.
Dueles Tan Bien (Donovan's Playground Remix) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d077e36278ed88bc8a9ac9b2c8f79dcb3b0f5deb074e02dd6ea6759c74ec76c. 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/ZZOPM2240225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a19a5da64ca9e3d80a81917502a7aca437aa53218861f6b536b993dc9056d7. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/BK4DA2308181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf1d63189996f6752a2cb2aaafcb200d9ec7ce034d0e618f0a96732e3ee9656. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BK4DA2308382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a19a5da64ca9e3d80a81917502a7aca437aa53218861f6b536b993dc9056d7. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BK4DA2308181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3786cc908b1ff8a65c5474407d3dad00c47eaedf361465a4d9467756428b1f33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2313844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a60e2bb53649e83579bc114b6080122774fc00cb02e6331d42cea3327bee33e. 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/BK4DA2326448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b69cd74e36228847954aa838b53c13f86ecc57180bf45df750be78f36472cc6. 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/USRV82400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9fdd06f5426163d5356ba78dd4e973e917867cd1cda1792eced51ff72eb7d. 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/QZHZ32160730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b1c4663aaf3514a80fa859714f3df519b585e748f0c454cc7d5288c6bccce2. 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/USHR22411802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0a6c316d8a36d73746ab3255319a41a87be27bd24d731be0cbabb99bd0920. 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/MXA2M2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0a6c316d8a36d73746ab3255319a41a87be27bd24d731be0cbabb99bd0920. 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/MXA2M2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd936a54771eb551fc9e261bec8e78f142deebd1faf6e07dcd93d82fed1479b13. 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/MXF012100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd936a54771eb551fc9e261bec8e78f142deebd1faf6e07dcd93d82fed1479b13. 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/MXF012100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c35aa02275486f22352de7f8716cfe3e58002b6cf1a61faf037089a6085e3d. 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/MXH612100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4abd7abb57ba3463a422105b99d695451e0fa855391c9baec7e5374156b6c7. 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/ES5152300874.