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 0xc360b8f4c6732a6b13e59bac34949bc3af53707e7c453e5adec22143ca082fbd. 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/1b18334b-edd9-434d-9882-66e4d7274a55.json and https://artists.proofprofile.net/proofs/artist/1b18334b-edd9-434d-9882-66e4d7274a55.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 0x210174aca10c53ed7149c80afdf9fed16fe2124ff61f6be4d4672a40ae609ef3. 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/USEAX1201059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf8b110b6b0df8e3ce40f57cc379c19c4af5465619990f057a28ae698f08ac2. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USEAX1401727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3627aa9610d9f19476148db31395b46bdf2be66d93e3c768e2ec42cda5f9566. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USEAX1401735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b765d20a580905c6ab4adf21a30741fde288425b76ac17ce474331f9d8cbeb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USEAX1502474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d321e6c07eccc69802629b91dac20f1ea8ee71a307ba7fdf79e5d295488c56. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEAX1502476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd24a5036f3ad00cc0762f3f1aaf40e37527cfea557844cd9e9d4c1a9ce2cf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USEAX1502479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ed784d2639f7358269b55c5a578d4ba3b2b3729494e08a4c21ff6774bcee0. 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/USA2P1698900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda89b49939a2d31e64d5cfd1b4186f90efd80ee6a0b3e54834976e36c28229c1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USEAX1703140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b72612bb056ebf08ec0b9dc7ea5541d7a5fc05e81b8d0b82cfe14277456fd0. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:55Z), 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/USEAX1703146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb3afc69e303fc42ce70b8cb0d14cd77e55af605d6d85c3b4e556646a4c1dab. 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/USEAX1703149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac07b7eab636405527723774ca41d391e9a15eecb77e31b24be2cd1c47fa4aa7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USEAX1800181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e04dbd1ad1df07f86bafb0c89d6200407cd1a2a0d65b9004bc3f8cd740ef39f. 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/USEAX2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f27f5f8ee2c4269a071ffd4b6cb3307a15a54a2dc53c409c94e622289fcf97. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USEAX2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df764bd805db94f890bbca7bce8b1e50f480c339d0de8c38326b7c44740ee9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USEAX2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef77f6477632a4ce27af255d064d492947c1cf75d07dcc5be4b6bd5bb4c5e71. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USEAX2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8400f4cebe0df7d10038e67a5bc69590e116df95db18f52a98e41ba1ec770b9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USEAX2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff878262f754ccb4dcaa45b4df96e0e55f347d81442469886931df0c410ae20. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USEAX2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa177360359e044a7669358abd9bc0db2b37e50eeb0c12f08a1bee39e0d1136c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:20Z), 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/USEAX2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697b1e0c09f54d32c0b993201a69541b6bd62ff3c271a6d56b9a7ed070bafb47. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USEAX2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223257b4d2b623fafb041c810f3ab822dd65cf0fae4290cb68aae4a6bd6b366. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USEAX2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08d8569f1e66670861f4824bffcb9615a3a0b1a1fbb0ee48f8922be9312a832. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USEAX2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723a291a2e5d628652972a97b343e4689fe9d1fc335fdb26b4d2f780aba80034. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEAX2300020.