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 0x5f0749915a085b3cdcc273793860853c8efb699b21aa8a89985a947d3ce00eed. 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/8e7e9d9e-9ca7-4543-b1a6-b81303757eff.json and https://artists.proofprofile.net/proofs/artist/8e7e9d9e-9ca7-4543-b1a6-b81303757eff.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 0x5ae3e448dd95f4f5001867ee068c952880115083850a540b1348c70fabe5d865. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGW2392370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4232a3fe15acd0d04e9f99595273d13eec8a20a49893ce2faf64d080df15382. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHA2324923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a68dc8a80c169af4a4d8552d95a7e02ed0a156d98f578ecda730255020a8f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAHA2324928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783babcff4af1552e50069bc1765a9af981065ed85a33596b950204004a3756d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAHA2324931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3363e1567673adb727b39e20204078a42cf25899a38fed237ad2d1d9a9e4c561. 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/TCAGY2306255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334d14db9d246aae14cced86bceb389eafba5936c9e0dfe072e1e95908c1739e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHA2324944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca274a15ffb22fa17afd828f86f30650bb9a5ceb3e837305ace96b96761c421. 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/NOZKU2307040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5540a361a9c3747e0818bbaa2986f93fd004bf8aab09247cdcaf86d6caf3ac1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NOZKU2307020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e214282d4e0f247af99c3b288a0681e3ab91f8d9213a45b3725bf1ebf7b3b7d. 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/NOZKU2307030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a8a5460d2e7897551c7348d9e214b22b1caa55d4cffbc36bf77d4b7647ffa. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NOZKU2307050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4250dc22daea1567f8028f133c90c332cb6e6fa369c14b0d1adf35c7963887a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NOZKU2307060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe81c665997311291d42d5d3c4f3f1708f7705e254192625786d0d4a4dc6e03a. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/NOZKU2307070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcf07d6e3c49a296e3485afd8fbcac79872cfac66be4bb09d2927d880ffc355. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHT2440329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e1432f577ac20f1feedc68367abee57f117465e001019ae0c2c5ef155d3177. 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/TCAHT2440322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe440a0538fd4896303e7f98edff5604a28cb4eecabc3a8ae591a2a54c5c0f9d4. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCAHT2440286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b92f238a8ce96c776c451e584547ddb4e0208ea417f7ecefe2b3582f4e4de. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAHT2440306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28db0b5bf37acba0b6b9dbe83c4bce169733aeda9f10d0ef0bdc44d120fc28f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHT2440279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265203d32e41c0dcf63c1f4dccaf0d66cb72da42eac410ff08bb2f88b3b115d9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAHT2440317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c4804ef4a2a9a337fc41b4e084cf65b00f4bae75ac52c5dfb443948bef7f35. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAHT2440301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed1e3cd4d0711090d188e8db6d85731789900568264024ee76e7dfc20f0c307. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAHT2440281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f06d6bfbd521dc6448841e86e171a1d970376a55b94332a490792ca36811ad. 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/TCAHT2440290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1d02de834499273fae18061278193daf240b78bac8ee2aa36defd20904f0a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHT2440299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ff0aea61f0b2b1cbc5806874c0670d2a0585bc155f57a145cd33566415a9f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAHT2440295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebfdcfdd6978efecbb1d194b26e63956c9baa9f602bcee9e37fc05570488fbf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHT2440284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d96346b5e51d8a830f4a6d0560991946c6c1e3ffc83a01489e695042d1806e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAHT2440294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e54604abe497e99c887ffa0abacfe5de1ac20ecf86c1515c102d16398a7a18. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCAHT2440307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9331167667fbd7ede5a4f0b90b529db451c4cf3179581545a96a9a691a7ec1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAHT2440310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b613589f9de0eaf38612cb898f24ed18d15bb3a18f363078565033905017a0d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAHT2440314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e8a2746cfdc1cba2abf50a5dcc44461e0a8ae57dee419193be93e183e04738. 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/TCAHT2440325.