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 0x381eb4efbdf2e2e3a75b7ab4742d769199f1dde10a00120650a68def73686d8d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20af3b5c-41bb-4f6b-9b57-95583f3aad0b.json and https://artists.proofprofile.net/proofs/artist/20af3b5c-41bb-4f6b-9b57-95583f3aad0b.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 0xab3ce0f715e0f54c03bca939d3bd777008f4c841db5157318a47145c37b8d112. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:10:34Z), 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/SE5Q52001445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62af2c6259e2d847cb0544370e034fc0fc97820ed25b666d9768490dd68aa4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:09Z), 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/SE5Q52103087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebbce6ce6e7d628249c852c549c6e006fd1f96baa57b38d765fbde1231dbf13. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SE5Q52104068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990557620a84cfbad06d2ad34f876e2cadb132b07d5501fccce1c3386ae496d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/SE5Q52200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24adebd128bc56cf0194ffe21bd1066683d7be02732d6e991ae193de3b78b3b0. 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/SE5Q52201086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b31e166196b483cf9754a2c4c089f0cca062bc9b5d4f07510c18ebd12cff33. 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/SE5Q52204071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc244a19c3fb0be34c38742b262fd35f5c51d0b87a30a5cb4b62f70df1dfd9569. 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/SE5Q52300774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ee77159e8d348eb7252d159d4a668ee10f87f56b85ab156ffb3d99ada51530. 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/SE5Q52301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc9968d040214a469634d07fbd6619928b6990ec0acc52eca5e507a3959cc54. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5Q52302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962141f470ffa320ae46ae1324006485269c270c967d0ea8adba0172b75c5915. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5Q52305171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d02af30e650d6b103f357f9d77d139e20882bc107c93b825fe995a34dec7868. 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/SE5Q52303031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385a43bff085f0e2a238d8f55027db240ce611e54065c1ba0f40c227903122cd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae87a88d0ac48e13b2f9a4f47dbb39aa7e3f83a99d4701b6258bb9a67f673df. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5Q52400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539dc188ea504be48ced721df207d9490a73ebf251412a2b2a35f4aabf2a32ed. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/SE5Q52400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4201f13e3ce782531f3a893dc0faaec1bc976fe5205f2b9be0c79b5a84942c. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:33:17Z), 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/SE5Q52400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74422cfec82a2519f29f50f33d21c869dbd5ace17f85b87805cc02eea66b857. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:13Z), 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/SE5Q52403167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb68fe00de03f610ea338f4e85d3e7aefa2cdc32c79e3a249ba2ecedd64f01a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5Q52403169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf810e064e3a68c1d5640baac5b5837365399dff9e385e1a005aa9d5157b178c5. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/SE5Q52500368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce9776620c94f4b25eed419b90b8228d41f96ced7474d22446d675088376202. 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/SE5Q52200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b16bea0bdc6c02015cd77cec048af68885de2c01833f92df4a8847d827b02c. 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/SE5Q52305082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc225323b1339e1972d34dfd6da35e11713106b488b120c99a2cd6503bec644e1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5Q52300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73fd1fc633765482764f2ece0e3b63f5dd639d2026015b56af404d588d9746b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5Q51901817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b59caa88677b6edb81aaabb9e30589148bc73dfa2e9388e90449c49f27123c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5Q52200597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aabed1393e95f19d51bf47a0db9b132631477ea84fe0eaccedbda2ad3a80b18. 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/SE5Q52400813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6239a9adf5cdf4b1731330af95224b60673524cfb10d3e570af3e84ffea42d87. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE5Q52401940.
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 0x27558b00841bd73fccb09e39debf03790efeb7091d635175c6f4ce6d665e2bcb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE5Q52402222.