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 0x1732b0d726148bcd68ae5e0f27ad280539fc61c0461a7e10189d002d53533d75. 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/d9daa152-9b32-4b8e-b5e8-2348dcf75ab9.json and https://artists.proofprofile.net/proofs/artist/d9daa152-9b32-4b8e-b5e8-2348dcf75ab9.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 0x0f31b60c7e1ba8f1bf986c1b99fa82598f1947d6d69b76b6eabaaccfbd4838cb. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/PHM119800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9889ec38aa8cd86a67ba447238bb66228c7224ae193e556bab51bc65e244b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PHM119800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bffc8a0c6734cc5bfa2eba724485a8a0b8cdc9c62c830171c28396d2a9c34b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:47Z), 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/PHM119800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88b2ed3ee0d743d1ffafa7c4a062cbd9a200394d1b2748d60414802d604805. 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/PHM119900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34d9a12db7f6889bb59914617243b96cb2bcd02deb392b6f1968e4cdf63048. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PHM119900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70fa0a4634bde15e0f4eb8aa2536b643f4382653ba29a13315a3322be782fb8. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PHM119900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5731de067706229f8555f47951da4d4e75d054e72de53726ce9deb4531b6154. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PHM119900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1074d65baaff4d1b464ad2206f0e5732635437158b2663e2669a0a5cd4935dac. 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/PHM110200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f3a7c8a2250b23531c822c16a574aa8fc663881abe73fdf9b3ec89f392ed7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PHM110400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9861b9ca338ffbf4b37d408b9378be0b04dc028d443fabb89758a0b4c07ac855. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/PHM110400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19a59596945b3f13461e9f4d5a2249b24f69bb22411d467953dcd7fb81678f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PHM110400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391911309a171f047c418009036a5c174fa3935dfb444dc980feaa9ef130dafd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PHM110400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e33ffcc669c622b5d5feb4fcf9e1592cdd125777e4b405c1f799a2c30d8c6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PHM110400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ff4801faa3d497c4336594d298bb3b7c6747012e6a05fa31014dc2bc709cc0. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:07:20Z), 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/PHM110800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c21b3628a5cae212e9e8cf5151e8f62e25f7d463d6f408b3d945f76f24c5c. 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/PHM110800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c1b356acd1cd726332784ba02221e615ebca21e527c42e16a9bb5471633dd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PHM110800172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb3edb2a52106cb4236f56bc6c8927b7cfcbaac0309b4ab226682285c2e6e4f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:25:29Z), 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/PHM110800176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99483d2bcb0b42dbd8282240d7720c5d0c8e12a7de1d0efbbed35ba19ffb6be2. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:24:34Z), 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/PHM110800177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e9474b2d86ad6ad4c1678ee4a2c8f0992c357915f537c1769b2ece41bdf85. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USDHM1206309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798509d617d044f56222963a1fd1bb151f5374698a9ac657a535176cccf0bd4a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:37:14Z), 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/PHM111100206.