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 0xc7f7b70d975f03b08a3a856ce45d5f752cde5052276a36551997f0978c739178. 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/c3f07d77-5b40-4bb6-ad4a-6d78ae5f3e02.json and https://artists.proofprofile.net/proofs/artist/c3f07d77-5b40-4bb6-ad4a-6d78ae5f3e02.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 0x96b835638fd2b94a42959d4760520526239bde27f837051cd70575b34a7a87b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d85b59ceab4b6476d266f047a04fbada8be97d72098b36f88324bf517cd47af. 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/QZW9L2374880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb9a38e9a96f81705c74b284bcdaa19a39715893ba8374be386628e4d99fd47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe947a4f41f4483c23a8fc89e7bc0f54d6d80a10f0f3e1caf9f1cb38f0585c13b. 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/BKSAI2300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba49ee16b78160d6b57c8e51db5d59e5ce16f5f6255026b4ebad1b2e6877e5c. 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/BKSAI2300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35a5303a35a2dfb6b63a795c83e46a2e31f7f5b5750fc9e2e445079c8630b0e. 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/BKSAI2300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4dfed3b4810d956aad1e55bed576bc7b5799128fa210d557e24658bdcf0361. 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/BKSAI2300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a919ec57f3b851e7ae6882b3253412539b6ef997ea676bab603ad36d85e75. 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/BKSAI2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328d5411e8cf44b4d55ee04d36ee8357ee16ea7ecd8e00e6eecabbf86b5e6fbb. 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/BKSAI2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576df606ddf63f818579d92048d1d4dd675224854d36df4ad0e1e98d51c74e6d. 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/BKSAI2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da49e9cd855b84d38f99733e20915684e048f886fd4bcc27fcff5d278e48404. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171670b3316fcb1d1868d31c90c6b3d0e8ae22c2d42ca12a623d18b0c017d41. 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/BKSAI2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d705339ac309e5c98ff2f767194b2694bc7a841e064ebd892899bb7fad26b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43de0c5a69328d2488959aa3168fc22aab31eaadc307a550bf7efd053c6d70ab. 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/BKSAI2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3640a4c0228c57228e5b27fd029f64cf7cd8755aa7ff68910d3ae1a0894a2660. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK1P72400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d6fd036a9a60fd1d3dc68d963e72db949b5574c5648676deb171619b4b0f2. 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/BK1P72400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9f786fa75f614e4224c561234e310fca1babb8158e5cf60351f57196474843. 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/BK1P72400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8617af58d92a3d6a47b7f2496e0d40ce74275e074d35dec4f80e75e00208be. 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/BK1P72400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91ce99dbd3ff42b56f3305c06bdd01dd773ba5d64b0582b2259320b098167e7. 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/BK1P72400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8b14168cda099f244d08bd66a6b34cefe3ea763da5efc4e7cd9b3049dcd70d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKSAI2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67455302cd2704afc24c08475554f1cd55491b298816aeacc8534d24fbb5410. 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/BKSAI2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cdbdacd9ecfe7335e3fd92a52dd9df015c560f6fe0159e06ea1d2700d084dc. 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/BX4IU2349047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7aa9e21bb781cfd9da15925984754f721d7557a99f580eeedc9f454b30765e. 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/BX4IU2339903.