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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 0x92be4f35989fa5ada9c90d423ff41c5db6321ced0ccdcd73c7065003feb2b17a. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e183d8a-a2a3-4148-96f2-1601a05063c0.json and https://artists.proofprofile.net/proofs/artist/9e183d8a-a2a3-4148-96f2-1601a05063c0.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 0x6cde3b319a3bd9faed742287080526982c2ee2eaaa6f598f84749e28a2845338. 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/QZTAY2314997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a712d512f6116626a3263bde87f9bef615986b657aec8fa006dfade5edc859f. 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/QZTAY2314996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb39f85eae8559149f1cedc2d4974d64add4a6c15665de35d780f6147c825a1. 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/QZTAY2315001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baf4a4344ef78eb71b706d816b3dcb4409d7dde06ca565be917507b96d15081. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTAY2314990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac82ad4e5530bb88b0ee40b7dedd2c141a4e466f899d4293b24842e377b637. 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/QZTAY2314991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d72848f3061883070042147789d5d4a942e849cc50008dbcdf78b67d144ecd. 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/QZTAY2314998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5643c9dd1d050dacae878497eac0fb3fac9adb613e558abc3194ae3ab3c00. 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/QZTAX2380759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ce6c1e74878c0cb43c81a5d4d1f4a194b8b5dc3becf49c6516d37e869e703a. 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/QZTAX2380762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50965ce34ce0625a4010b37cb52186f690533509f173986d80495bd880fafc. 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/QZTAX2380766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe245c97d1ba60de47f4041d3810b03cd302ef9b7555b1b0daf5d47c3920831f0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTAX2380772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaca1631b27b012a19dd35a694029ac09b35530b0c6a57cfe05ab5fbb2dfffb. 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/QZTAX2380774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b7d605f1f592cedb6c6d7ec44c54e43c747d59f2a09492c2ef8d4deb6ca0c8. 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/QZTAX2380853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556a205b8f42ec7f6b4b29f1fa53d333e05a252bbc395c93764819a4cd0423e. 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/QZTAX2380854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6015e543ee7e6492b7184bbf575810745951e607ecdb1d286b7a2b4e7cc635. 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/QZTAX2380857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3db1527729f06e33fb58689e80198661a1c166637caa960368ae2d4ca8440c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTAX2380858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc59c1a4ea9e1ab7025bf040c8e6fa2e410ed0e334efc1e0d1a5fd8d7a0b13f. 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/QZTAX2380859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95dfb37e87f20fd433a1d9314b37cf6831b9afbeb953d3d6d95a0e819d69a97. 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/QZTAX2380860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e194f06d4c9cac1b11cf93686b1e906a1b3e4e94b11327a165b4eac40b3f451. 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/QZTAX2380861.