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 0xc37cc848d501fee0616a6e28ff4c3c54d0f2e26aaecc9e0319c639d3e8de31ac. 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/fbb9b212-a2de-471f-99f8-1987397cf00f.json and https://artists.proofprofile.net/proofs/artist/fbb9b212-a2de-471f-99f8-1987397cf00f.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 0x8e025f6ee15e3e603bc828fe0f6cfb0a4169b96b0ea177ec87addb8ed49b2f7a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNW72286738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dab49a1b00e986ac9bb71816affea4fa698704ad5fe14ba3cd9c12ef1bfee7. 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/QZNW72373572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc51187ac0c7c4fb1de48ae4ce3b3db3eccc6293e85d0ff4428d29b235f259f7. 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/QZTRX2307412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea89ed16e160b2b6fc9bb701eb859e09225a69f0a20abf4843c6e6eb57f141. 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/QZTRX2395732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea89ed16e160b2b6fc9bb701eb859e09225a69f0a20abf4843c6e6eb57f141. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTRX2395732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d07bf93677f6f6e4c8123e64f6762ac8c7020f67d6dd9d73706ef2d2e7259. 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/QZWDD2379929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0132a0f9fff06ef8c27c2c6ecdd8e6ca9dd2b28a317b4b0223b4fb126a57f129. 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/USLZJ2407121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0132a0f9fff06ef8c27c2c6ecdd8e6ca9dd2b28a317b4b0223b4fb126a57f129. 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/USLZJ2407121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543002ae40d62664446ddea04e2f41dafa3496d3ea5f86dd54604b61d9c5645a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P2461625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e80ae10d273d77bb1bf8c8e862090245574aba1760d0403322d4992ab503a1. 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/USA2P2461626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d648b49e750f29ef38cb534893efe5eb82fad17f7fb7df736a28057b5cca2. 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/USUM72318219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d648b49e750f29ef38cb534893efe5eb82fad17f7fb7df736a28057b5cca2. 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/USUM72318219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2272859a24236e104da66b8394b437ccad542064b5095fc5fb0a8716f8bbf88. 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/USWL12403228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb90dd77525518a6d2f44f76acf1278629304b7b432d3f4e75034960cf2b4d. 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/MXF152402062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47e0b09dc5e3c51ce37e0c924a6f82278ffafb6af9dc6282ec7266b64277d6c. 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/QZZ3N2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a8342a266255692c0669896cdbf435b8609b8943bc57c9b926e9b23e053b91. 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/USCGJ2484498.