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 0xca6ec7fb96c7b58f8db82dfcfe05d5a19244cf5f2717a210b85c1608736300cd. 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/29ff3f25-63d0-42c2-9c98-95d0a5fbf0cb.json and https://artists.proofprofile.net/proofs/artist/29ff3f25-63d0-42c2-9c98-95d0a5fbf0cb.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 0x1d4038b333322ed7076a058ec2455a4b0f151a82f103fbaa5192bb79b29537eb. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:20:07Z), 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/MX2832424683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b98efeb50dd35b1331f9ae5019a18fb6017c47ac964977c10e22cdbbb12c26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MX2832429322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a7efc0f0360a445c7882260470516dbab0babbbcbc0cc9c86f2324ef60716. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/MX2832464786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d167675dff681c130205b26936d00bd3a15f777226cba3c09b48f06f63e81ee. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/MX2832464787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43f11c60d4ba48b2faf51afd47f71bb557845d0b52bfdb1e0fe3ed533f5a6a0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/MX2832464789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9532089c7c9654561e92dc6b969eed6517064a6ebc5cc64f66687466c7b3b33. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/MX2832464790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01cab085fe0a634e21085a40896f804bf28f473979d68e46cb00d324e335e14. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MX2832464792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045d49944ad7948babac4e964f0d937ba4aed058fa1fc67736842a548d073a6a. 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/MX2832464794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e297f75b8c11fe28c92168da93ef2ff59b1cf4b60b77e35d38b6d65e792304. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:06Z), 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/MX2832464795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9829806a3a6daaa74af7d68f1392925598f007b008407b721fc30b4bd854e. 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/MX2832500876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97f0fb067f56c2bd8e911e7c2f8a6cda6664ce26c7131537a4b102ac091e93e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:08Z), 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/MX2832500877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb405b583261513f9cc198a0262744d7faef381869de2478809120bffe052db86. 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/MX2832500878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c21541d34773055dc76a95273b1adad8c54922457d6ccbda7a760827a31ce51. 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/MX2832500879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8099e04bd7684012d11a20e7541e4f79a8c81fd49a3314e0b8971c57bea010. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MX2832500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bd6003a7ee0a3f261e06d1ff89545f99d65437e00d6700c49e5583659b5574. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:21Z), 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/MX2832500881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436c3d3d17dd11f37c52893897f0abc4d76fe403153c5a10999ed71a5a9a8b75. 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/MX2832500882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d66a572e2590e27382e0ce6fbfd9430ed8ced42c5991a8ee9fab1ff672394e9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:01Z), 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/MX2832500883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8451ce7e689e78239d4e9692935f0bb15cc818baa767530e81c90265728aaac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:01Z), 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/MX2832500884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6354daf77f1b60254c20e07c03c90466da3828f7def6477e33e0d7e79ad9de. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:01Z), 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/MX2832500885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f9ae334c6cb657ef01c79db7a97075e47482fc5d526353c14e0c1929afa010. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/MX2832500886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f69dfe25517c43f999603c5469e61bd90beeb8e8587fbe365ca081e09490fdd. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/MX2832555141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe392f398dfbfcde14212cbaf7b6b7238e383a4d3500bd89be938003ead132096. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/MX2832555142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847aeb81c3a1e09a2a7f70c33c856a10bec883ce64814e2bac6d67e9a176548a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/MX2832555143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ead61cb38a12f5949ee531b2486eb16825b40c5a10aa0a904c878f0c4497095. 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/MX2832555144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4a9708ac61d5b7c93101160202ef55ff07fa6146bbd254ddb33cc4be779a8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/MX2832555145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351444c9829b64948aa788ec3ce303130f8b8e599055dc1873e98debef28b76d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/MX2832555146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb78f40df0430adf93f8942c157638291a471ac26b8e707ed3560aa6412514. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/MX2832555147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5bc292bcb219ad26e3d4a55f577a8ab53bdd2f8addfd357895c40f91a99ccb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/MX2832555138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dc07d0eaa2dd8395d163c52b3dc0307850b3122670a1b1f8fa1f4100718ceb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:29Z), 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/ES93S2500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a97fa083f127d85d1bb9df9fd09fb1da7c0412c3c5a308b619a2f911ed9a749. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ES93S2500486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3d9d48425961bd91877fcf93041dbd9cb3fbf419bd5c6358fb9708b57b3ff. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ES93S2500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808f4f6665db8b3b7e4d178f352639f22c447b53b0947bf8fec2fdd34e655486. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES93S2500483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaeb64196f9d451771e63ed3be3662eea5fd9078a5f5b9773324a93a5a00cbe. 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/ES93S2500489.