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 0x285e0b2be15669473ac34d016eb799d67f00b12d14623f3c70cdd39a54526e30. 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/8874b4a2-6afc-4350-9d72-567d7bf166d0.json and https://artists.proofprofile.net/proofs/artist/8874b4a2-6afc-4350-9d72-567d7bf166d0.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 0x3ba6de3741496271858dcd6238083646349bd801750b90cacadade88097b5b14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA71811172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1aff5a0837514bf6d01e60578a2da6a0cab3f92a368fbeb0c1c840eda3a83. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES71815954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548a2313022d7c13b1b6e68df5c629234fb0b4a3e95d40f2b13a0b56cbe822fd. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZFZ31927216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcde59544bce198e9abdbd3f7eb6832fd9f4c5381f8ae880eb88e8990cf7d506. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN31942760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefa4cc122d4026dd210185dc5bc5873a312bdf64247dac3fb02c15cc5e16739. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZHN62033951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52419e5b9ac265adfd7079d30c464d62f9070e606f14c7d6735eee0d95e31ffd. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAFM2179576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6b97a640f677b65bd69e2c929ce36e1e440acd2a13deb6cf5848379399980e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAGE2293609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb059ca34ccd16987fa79f90313bc946449c85420130557a6e875ab56452a8d33. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTBB2216127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7f302d6e625dddc041b992e243dd1966d19bdc85cc6a6224688f86223fad4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82353264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda180b50e77737986a62ddaeae68738f3acfa047bd0be5a07a9aa10c152f6817. 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/QZTB92323638.
Haitian Compas Festival (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eac298fdbd6a4639756e8c6f2280e9c91e64f0f148410d1b441026790bdc29. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFF2402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb789b37af7d3f8237842e8efd6d4c953cbcc8147a80ea0f526f7465b3e58dfd7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZWFF2402007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb127ff7498dc1526454deb5e0b345e74e72de2c367960f2f852d0c477ffd434d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2402008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eae06c956e24c950d7d238cb11fe1bc542a0b97688cc5d1a0488fd16e12739. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZWFF2402013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e46d567e949b5db7bf6621c99b3c455f8601120efa6ef00a71a489faff11201. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZWFF2402015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eae74078f2e15c84951ed4be998f139259c96df3157f8919c9a24cee64fcf98. 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/QZWFF2402016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd181bde83e68c68807ff9d80d8a7c6eef95aa146808d86074b4f80cab885b202. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWFF2402017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ce0abcdc49a01b18fbfa11d16ae7a8bcd845754308985a14f20337e99727be. 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/QT3FF2510151.