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 0x5e869b0b2f1ee34220f5bc912ede2c556ec0d35f8c765267a49f7cf3cc92332c. 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/efd6d9ad-afdf-4f7b-a185-8c1c199a0611.json and https://artists.proofprofile.net/proofs/artist/efd6d9ad-afdf-4f7b-a185-8c1c199a0611.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 0x89749751c8eba8530107de4fd3f2e3c708b7b2bf15c50f685d0cc1fabdc0e8db. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAHQJ2592445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e0a8d6367cd8b2ad0a8620b631020b21902b328b60feea9809ee1baa02ec6d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2507146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab3b98d69b858f9e1eebef7a69332550b9d81e8bb05043085dd84236a00f205. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:50:01Z), 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/CACWV2507150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a42b5748f1d2040e9a5ccb55685b176e7e29e13d12d9ac540722dbe8bbcde81. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CACWV2507152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05dd20e0b7b730f350a484d21e2fc5012bd0d226cc6bd869fabe1de80c54f3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CACWV2507148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d54fbd6c2eb5be556bda5b5eea833564d98b59b8c3c3597f64a560c44d25c2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:48Z), 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/CACWV2507151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb073c0dbe15a47008db8144ad61b79b4853bc7728f4e2a166da33600fe1870. 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/CACWV2514939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6beb16c0a07d67b132976ec86797601cc2966500bbeecaebcb23830f6086ee9. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CACWV2514860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6eb8fff57ef58bbdc9cf584ef4812bab5cce5df562fc27cd86312212fd6c50. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/CACWV2515050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1852d724868563105e977cedccb55cc8020a37a6b750ad7f6a0579237d448. 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/CACWV2514940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39d0f8522b8a77c49a1c4a7e1cd1dd49d1812f5df7a5d6aa5a2e6af0f3a1ed6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CACWV2514893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefee843a23880e41295bdbe3590a98a8027546a9d87465c5b4b857d08834236. 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/CACWV2518887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb848e9fd62aa4f777688d89914162a991e7859da7581966a26afb6e5502f56d. 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/CACWV2518741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0db5fda27cdf1144e76e58f1cfe09743e2e717612b9730c7aa60ae7ad61d70. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CACWV2518886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb15233597bf47b281e04e6e338d9080a3cda344bc8ec42d77d954c0a145798. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/CACWV2518734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d236e4c5465a4c637e3296b10be0e3c06b7833700f426cd4215dc444c5f6562. 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/CACWV2518733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b16ee306b39ef9532b1f6f2ebf588fdbc6160e57363b03710b89e3b3233115. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2518888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bd7839fe77056826939028ac26a4d8c16906306ea880a0b44d8ff7f3307d7a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CACWV2518739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b970b0e5aa7c9c5a00f53b480ae1da04404a01adf77fcf379e3663aaa553440. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/CACWV2518735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258db7d54c3dd1694191b8a5c6aa008742b5fb69d623975887f70722e2ec3bd2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CACWV2518883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58ce0c34b93e5d84bf4231b096a96bf017b19023c478901cc551bfda911ea47. 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/CACWV2518884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79d529cf024128b76ee5e5a996c666d8dc102e90dd4efb5fb44f97f8ffc0d7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CACWV2521687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918c6b6f35d41f8c3027866200af99e4ff296faf5532bc1e13cba732655775a7. 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/CACWV2523542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5ef3048d3b8854b7ddb950a13c1afe7beeb2ca574b11745b57aa8fb9c79f76. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CACWV2519959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5cadd4cb5a394512178566a059b89dea07e24352d22b12425643a228149b38. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CACWV2521681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be96973e2a6621b492834ea38d1b1f83d866421362d2275e6ba6ae3aaf93cd7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV2521685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e2a91f12fda5dc468ac1ae454e68e3b469d473e915a4534fece575607a0b9. 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/CACWV2520219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e51f79a3aef75d081eb7fc5d6f7b3b8fc4dc2eb98bd51c2a398cd1773276f9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CACWV2521688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283307db77fe04d5020eb324c1db696d4f1872927b3cb3a155d183dcda791920. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CACWV2520225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07175aace00155b1f59a37bcb81e590401461e33e19db4a1c6ead07f5eef9cc2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CACWV2521683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91d33944e27879bc452242d3f7bc11407f2f3c6425c726f7d6216f602f26016. 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/CACWV2520197.