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 0xdb48f42b976e5a22bb1eb077b9c9ec7a75ea1d7e00b16a6c9f6cf7e9724e6ca8. 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/7ecbb347-e654-4bc1-9ea2-b0dd5f0ae2bd.json and https://artists.proofprofile.net/proofs/artist/7ecbb347-e654-4bc1-9ea2-b0dd5f0ae2bd.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 0x7cc325ba5c194feb0e671a5e8d4e3bb9eceedb7e279e8b52d27145adc9b993f8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAGOO1880458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0fdae9c6260915e622715d838654c4878e952311ad9abe37b2cd2dc264678. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/CAGOO1880470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069ac4641dc8d75cf5ef54e42553f1887efe5efb6ed8ea73dfd755ef8c9344e. 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/CAGOO1880504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b8a39998b443a0579f0254f76fb30068fe459a5f9c76d2fb81bbfa35086d2. 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/CAGOO1880443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4251e07f54cd2dae7e44c9bbc218d9ed1cc8be9b9d65fe1c94909749b3cf14fc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:22Z), 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/CAGOO1880453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fef1275483d300cf0b890d80e76aeaee6fdc06742a81a6f150f3eb5aedbd1c. 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/CAGOO1880465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4f611e2a8a9c5cf404b8e106988872a5bfd7149faf5a142e6b3ec3247c02d9. 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/CAGOO1880489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fb33b2c2dbb5e55540de120c2cfd24d52bb9fc0ed378faea24dced16c0ccd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:49:48Z), 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/CALVP2095595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd10b3ea020006e7094e3995b1342cc8563de6a4f9250c9a64a42fa1bf4c66b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:01Z), 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/CALVP2095596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2991ec7c826c54248e5a573e8ba355d267a6754da76a8f48edfaf47ca8e757. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:25Z), 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/CALVP2095597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfdb29dfe380684ad8c964b17c21cb0f89f4dd278e2e031b982dd231ea61228. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CALVP2095598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71296dac9d8dd4cdb0c0eeaf546d36b51773cec98809748a3bddc8fecd44e67. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CALVP2095599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21586dff2436c52d3ffd31d5fc4fc9edb75223259abb7ef3c0d13b91cf8a9e42. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CALVP2095600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e05bc7977f96467f4fd8d3548e79b243544d13e0be9308f05dd7985b5e5e7. 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/CALVP2095601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230664f922b4799a8c3af1f35033d4d9dd79c6ffd01c243e9242c4e7cf4475d4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CALVP2095602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a92632c3d5187bd09844bbe424fc57782ccc6def1b6ad5658902de6ca6864ab. 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/CALVP2095603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd761719858d6125d7a4faeb486fee0f57625482a9f11289fe6a36dc56703f492. 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/CALVP2095605.