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 0xa73b7d34c26b88d0b8f3b3312811508cf0b1ee99404eb2688592cdfefe6f65aa. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/675aa17c-5e53-4018-b6fa-ede37db2bd5f.json and https://artists.proofprofile.net/proofs/artist/675aa17c-5e53-4018-b6fa-ede37db2bd5f.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 0x05bf46f0c2f95c679d26f03e18254c9126f6629b9298833cbb247f8f760570fd. 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/NLL6R1800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14e6601f1235ecc71a22c47c32f6b02cc7766f57d0a7dd669164f33d0eb3937. 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/NLL6R1800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ca82a82a0481c3c8929f780bf418fe329f339573847d22f8dbfd104598458. 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/NLL6R1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a8c6c2c8cc6fdf53ae68e1569bbd91447285ec426bbc7ebae76c259d135a5. 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/NLL6R1800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1d8da8b8e2480afe8d51ab4f70d3a67b0ed3ecddc09f7f7b0446868e8c267. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLL6R1800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7357fc78893f630f46167b2efc92147f3e03778834e995a739f708f1042be169. 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/NLL6R1800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48debcab5b5b99fee586a92860b1d8f55b0b81f632628140846b5a8be498a8a. 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/NLL6R1800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f83d5e2cb0aaf7951dab12538e39998ed06391a19b4ab279c77d6cd028049be. 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/NLL6R1800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f1af457b3148f7ec540525d3fcb583d8fe33108a7839e379d45d8de406f97e. 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/NLL6R1800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0bde22f3ac4381a6d992f2a14376379eb9985fe5536c31496f87b940b41b6b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLL6R1800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cba85daaa8ab0728bf1867e19e73ccdd81e2c0ef9313edafce81db07540f1d. 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/NLL6R1800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1686ea408799b6455a6bfe6f9cfb166dd1c53c5defd23c92bfb0a25b7a00dc4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLL6R1800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc705be992436c091f80df70b7590ae3d88d6da710c89e17edd1582c8686b582b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/NLL6R1800312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ee3b18ed4537c8af1606dfcdb2a6586e8004f8f40c64ec5b1b215892884cd. 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/NLL6R1800313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8044e698eab3d9403c379dd0694757fbf6c96a48cdd6031aaf954043c635c698. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLL6R1800314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03725f8577cd0227ea10f24c2477f67cf3c97dc0d1339c2e8838b0f1acb27240. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NLL6R1800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9963d7952e65b15fc546e4f7651f1a976e8b08848d89caeffd62ae1eb368da29. 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/NLL6R1800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2768ae2f0f478740bad604a6d1c82d5a1b56d1b05aa3c8d927d8612be2e08e9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLL6R1800317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd31b9be642a534e300baf0f046eeca0c65d4f38bc6a7bac205f3cd3e627bb5d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLL6R1800318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf019c816305ce06090561219041179ea96eedb0be51dec27f1c0d08613b00d38. 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/NLL6R1800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a11283e5576e0327e5c9bb0cf453e7abb2243fe5184dd4f593130a24866c43. 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/NLL6R1800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072271f853cf5b07084dcefa19b5fb990508bb1dd053e56ea9d351e88fbd63c2. 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/NLL6R1800321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2dbe96f6be1e3d72ac0f6de0bfeabbd3dde0653db8b95909654b3d27f14b71. 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/NLL6R1800322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f0c73ca2fef5a1966f789af663358b2692102f1842cb2b26441f347e7ce73. 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/NLL6R1800323.