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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4110d824f8ad3eabc683e1012acf4267b7f18f623f0e82999179355b044abb7d. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03774560-c846-47da-890a-4d83a99426d6.json and https://artists.proofprofile.net/proofs/artist/03774560-c846-47da-890a-4d83a99426d6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b156cfff14ae74acb4eb8aa3228c43a4ce5655796ad498db8ff8e937760c392. 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/QMS4L2000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd399e59d47ad1e69613cc766e262f4897392ab9000a1ac04599bfbcc31cf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMS4L1700347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fef97c5ff28dbd7bd936556a52c148ca6ceb71c7b801b62c9f5b13998f1a3ea. 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/QMS4L1350540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887ad1076f675956ea994a8a2e3c3236d80475dd1dfafa3c5cd7b4b25d0fcb98. 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/QMS4L1350544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ada0fd69fa73a590e53d9b7cda905c6f317bed1cb0130ea6a2b4e8143091c. 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/QMS4L1350545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf165987e398d0676cc26948baaa59001214aed154ce5ee72a25d7ba6bdcf4e1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMS4L1350551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1717a30de9c045ea7cb5227e467a2ddd5274349405f0412a87d6965076fd1ea3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMS4L1350543.
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 0x0b2cff9359cec8e0d1708527da28473d7072894cfae0bfa886236a468323f83f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMS4L1350541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9aadbe6a341a1ced98c70d02e2061bdba463b6b1b677e9dca2a601286ba9fd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMS4L1350542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc889b11780aab75bdd93c7ead450b7b8f56b972386945fac01c3b794ed9512c1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMS4L1350547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e20df63853c27dad0d536f51d4e5f796f8e671193820b252cf7d7f5d4a50d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMS4L1350549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d89c887cd810ef4eb11793d7efe5c169c2fb60382012573c7ecd3bc13a608a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMS4L1350550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549def462ecf27db638eb7008141ce36f4559f2e98f73cbd18871fff8f5e84e5. 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/USEWC0771740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7732fd7bad438145c3a7891226632bffe54bccecaf141b6cd5cb6cbbdd5e41a. 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/USEWC0771834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf378b965d76b8719f5c3897791f994ead09837ee86fc0bd6518f21c399274c49. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USEWC0771902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fbb9e490e9cfd42179830199edc7e515a8e8f4a8d775a0417d1ab3bf8d8106. 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/USETB0611835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f31f56ebaa701d93d4da9c20ef68e11cba0cfc7d75267cd672ab6657e7d3360. 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/USETB0611837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcb7ffcac4daa9beddd84acd0468dc482b5c7d2a369e126ff98e13983bbc178. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USETB0611841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319df6cb1d52273bd6c18e3c8cdc851a2ccf4ec3f1b8a1b22f260cf6f1b60b41. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USETB0611834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e31a308aad249e81fa02b5fde2d2f8b89a2697b4dd2cab502a4d0da5852d43f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USETB0611839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf027ad519a93fef3a44fd1b52d3d9c2322bbc3277b7f1faac995c2594dacbdf7. 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/USETB0611842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e85bd177b6a9a4c181834d16dc90f6410fa00ca669dd88db26f4af7c3e2b6b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USETB0611845.