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 0x6bcac440066c142f777cbfb3ce6dd715709e64201ac6ab7cd0f14d6f44daa1a0. 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/53921524-d239-475d-b1fe-666b5c14fc82.json and https://artists.proofprofile.net/proofs/artist/53921524-d239-475d-b1fe-666b5c14fc82.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 0xa2b35c63ceac3d36a202a597c6430d2e3b2902413fd0e3e60765f9e2c3ea870f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DET980700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854284bb3a4b3507ec18ec2d95474ed4e731d3949860401522e61d2fea57e95b. 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/DET980200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0c9cca5a7a42832358da1480e9098c25656b9171e742fc2cd32835a4e25be. 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/DET980200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f2f6aeeddf0cecdd397b3eca3a80e65b555ebdd72c4a2f1ff6b7f539d73e36. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DET980200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f8c2ed6b2f59b4122a994a6dcbb50a35cd57375de5ee7ba947a5e3e5782e7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DET980200014.
Passion Lounge, Vol. 2 - Emotional & Sensual Grooves (Compiled by Henri Kohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137b6eeef0a3dd7241775fd19bbf7a6b1efeba912777c406843271d8681c49d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEU231500573.
Tributaries: A Remix Album (El Búho Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62904920ee3c8f36e5d2b00176bfa4851bef9a09201e14da531eb3e4acdafec4. 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/USCCW1610860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd785b1501d677d618b653bc78554ddb9da4d916403b09f6ad93400deed7f8ca. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACW1798872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65deb20c1fa8877350a96be12b48cd567eab5566498b4543956231450b7fc664. 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/DEEQ70400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71830407237500712f16bfbdff46e4eaa9077baeba59c343183f994f96f17ec3. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DET980600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7136bf4f027e40c469b38cdd1501a20488bbf4776a3ae33daaf2126881cf687. 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/DET980600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f09e9a67a598079052d54569644d5c1a872f9b9bcf1632a698fae911bef13ad. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DET980600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54574fcfabcf788104fe2931f7c0d54aef2ca3aa63aeb962f66ca0d9901c2b66. 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/DET980600017.
Trip-Hop Music - The Must Have Selection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fbeeb43cf1d13f90cfa4667938aac7b3509bef091d19f952fe5b3d620498a9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DET980900022.