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 0xff9299666c2db8d488f0ca4fd241542228c7cfd1b64abe790a7407110df3de40. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e1a2649-b61e-4e36-8700-33ad6ceeb078.json and https://artists.proofprofile.net/proofs/artist/1e1a2649-b61e-4e36-8700-33ad6ceeb078.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 0x4c20516710452608f3e1241908e5f7ce62f8e6066d1c739b267360b70b9146d8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2303497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feb638111d6566646a3a4ebb7ef6fba77022374b748d55a665e42be98d88301. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US83Z2303501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c5bb84cacaf61676f2ff5436a55db3663d9320ce44433a4b4720804260674. 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/US83Z2303613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec069284076495e74aff2fc8883f286d7e02c83ca2af06c244c058e27c2181. 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/US83Z2236157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24416383cc04a6a42e6acfe2bf5c277d548e6177fd6a697086ebe205e5c9456a. 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/US83Z2498011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09659913558564f90c8367ad0d3978e5e96bd09068e413691c1ce3b3b399afc5. 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/US83Z2498013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2565670bce41380081893e0a3cb0a7a4e4ba025860e51fd2c8b5425aa3d38. 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/US83Z2498010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdacfc38a1e751a2aa8f0d532d3f8eaa35b9e82ac0fde7466a9b8eb95b1b461f. 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/US83Z2498012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c32dc9b478844854f5e25484e323eb19efec13ecc975c804b743b031541ff1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US83Z2483252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040c20af3f08e96a899aeefed0d12c664645c6b7b20213005d71a529335576c. 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/US83Z2483250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a334c17cb91d074e5f2102d35090a12dadc88ee02c02ef75b5de562e571d279. 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/US83Z2472069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78c45ada421b207bedee6dd92214cd48d82c3274e11424476fd633ac1a43ce7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US83Z2236418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca40cdcb315ad7ffdf156fc4e47be63d2e180e9cff4d0c516a80322cbc66abb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2236419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1006cd57b22f1b76b8410d65a474dacc50d43a6a6a0b85988987a1d47b7e93f0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US83Z2471362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a961efcfeffadebff95f3b21db77587512e2cb719afe4de8af57c0d6526e46. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2232613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561053c0acdda429e9de5c6b0673d483683fc6a88122858b55042ca91fa6ca35. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US83Z2321667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00fa001359b6fc3c595f155a32c26b016f08087ec0c8a9e94035af4a90e682. 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/US83Z2321668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cec1635fb40377166757ebf4ab51489a8ab7dcd5ba72e01f2f816834295976d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US83Z2320018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4da5e6e4c8dbf1f570590c0b2d22d5a647b6388e6b2e3deaa78e4cbcff33aa. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US83Z2339112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfa6e78029cd15983632062035fe056a25ff46aae85a3f4db7d5d2a57db68fd. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US83Z2326322.
Progressive House Mix | 2023 | #16 (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb866a80e972e8affdc384f1f28a8371930987c7e0356af748cc9c29feb28e5ec. 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/US83Z2303818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea11fa2a219232a408c2209e437e0eb09046a7c80add0e86470795208cfdda6b. 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/US83Z2325911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120b6edd434f7d2b7e027636cfcaed7b9bf99eea4e7954831b1b9666f23df084. 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/US83Z2231064.