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 0x8bd5f11518fb46e986b58adcc6b7fafe411034771abaea767a8df323a0f6a055. 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/e8df3941-5f71-428b-ad32-8b6db56d34d1.json and https://artists.proofprofile.net/proofs/artist/e8df3941-5f71-428b-ad32-8b6db56d34d1.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 0xfda66569177c30fcfa4cde1bd8a774211e2c668fa715524153fbcb3ac9643bd0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBHEZ2103145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf576f6f59e19fb7fcb6ca19d1a82126b8f1f75ed7b257c108e462d5bb5c654a8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBHEZ2103146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bf2bc6088dd9f13b5f0547edf1dcdf6df4547667c6cff5c65f31301e26336. 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/GBHEZ2103147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b386dafb0f143526cb56d2d131905327fbfffb97b1c11f7e2100dd30516281. 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/GBHEZ2103148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc385731797c63f0425958466ad0456722d3d480273a5b506e5a36bc7c09191. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBHEZ2103149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ecad7f395b7deffa5ea5183f842485ca151f55a80d90dd7d09b7df1dfe521b. 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/GBHEZ2103137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65360e0296718a025df19eafb764f30a041a0bfbed7e057a1bc956659733055d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBHEZ2103138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22ca9577231f0c0af8301e618d64a108841c3d09855332836d001814dfb67a. 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/GBHEZ2103139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa730a9f34cd9be8695a199ae59139052066cbfdaf9f8aedadfa119b31e5690c0. 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/GBHEZ2103140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fceb1bf415f592855e055d117d6475178cfe47c9b2ebff2ce0f6bf41ef9bcc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBHEZ2103142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fddde3a316a267f2eed6bf51c6feb8bb28e758cdd80818c6caaf9e3334ea7a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBHEZ2103143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf771b4015ba5f63b80c54caf144aab788e2cf5efb9c40d8fb1f977b61e7b50cb. 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/GBHEZ2103144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58856a135010ef5c723ee921bfc1e2e961e4ab70acf78b721abb4f5eea3cfe4e. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBHEZ2103136.
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 0x237853beffcd47b2c2ccb23b934cd8830b188bca692bc3a71009f75330b1efbf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBHEZ2103141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa671780c52a3b9c22317e0a90a8e4bf06d9d5dc0bdc71db2a7f45c5233d49491. 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/IELOI2157175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a40f48a23a41cf0cdd7fc3e61e5907491ed7626f0bb981916989c3cbd5435. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IELOI2157173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc4bb6c2a7378ebd6af0b7213b2f9c8ef2d20a633b8ec025776da63fd7c7a36. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IELOI2157177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f07ff34686257a5b9525e277f67c32a67770ceb613b994722a7ce878349fa8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/IELOI2157176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7649ef918359061bdfa1e6e63b836ec4be4669969521d6d8c4a78ed10e72f6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBHEZ2203311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe865afb7b0b25cd5fdd83a3c5fcad44ee415f5937af95053a69b0f0c90f965. 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/GBHEZ2203313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30534050d333a640b3e8b9e85eac73b08afa7fcaf987e65621c13b851672132d. 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/GBHEZ2203315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bb2ef624e089f4d496e71f6fea1dbe618c6d76e70cbadd1f8f0fe71b13da8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBHEZ2203316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9d13172b9d3035bfb027e3df2f9b5ee3c4505f1851a8aac283323a7a0dad4d. 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/GBHEZ2203317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef6cfa88206dff061f8999bbe20c6b02a387ad3f74566a721ed1a6f66fd5f25. 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/GBHEZ2203318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee910d3f7472980c7f45f4d67e0867e866e226d00fa5e0072aaf83a4404b1dd. 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/GBHEZ2203319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e243d8d8b6ace599773ff1b96cee4709dfc3c346611232e40cb9a2a15eec7f. 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/GBHEZ2203321.