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 0x9a08eee4977ef2743ffb4152e63f0aef22659e0380b02e5c87d02a3204fcf9b1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/725aa227-9acc-4cb4-af23-d89042fa85c5.json and https://artists.proofprofile.net/proofs/artist/725aa227-9acc-4cb4-af23-d89042fa85c5.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 0xb9a069bc0415d84980c473f858d3bdc281549b540faa5c8ab787cdb8c573aaa8. 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/DEL112100562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c954f7a6ef7450750cdf6a726190343329c8315a8a32bffc6cbabaa2b747c4. 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/PYE762100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a7b0d2abd93fe6fde7f4a7702ecb5f293b48f93a5c325ed07b528ed7589c1. 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/PYE762100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab24d76c95d7571d0607fc0c853ad49021fe72406b186c75b9311faa11b47ab. 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/PYE762100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc31e0f2fc9df6c184c8a8eb8a1106591ea2bbdb3b8142b9af2163630f04990c. 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/PYE762100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96bffe0ce52c1cb754d2d9ceb0e0ba2fee22e4ad757a758e9171dc63fcefa34. 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/PYE762100499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb679fef74c6fce42348e6be83f4ff3ff5e97f176d8f1065357dcb84f03bec2a. 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/PYE762100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35dfe549d797144597b2aa8c77ea740bdcbe8bb60ce6898670707d9e1449330. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCGH2135714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50fcbdbafe3dd0e36dc71653e3684668ff5abdb0d556e5637a47b555cf63a6f. 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/USCGH2135716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212ef85f8cebe5ef5544e936ac2b5f4f828ce4e2b91061e349969468931e448. 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/USCGH2135737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45383d6bdc7934dc15b6d7643935e2674d2644b77fff0866abc76ff8ee5ce0. 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/USCGH2135719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890687598ac8813ab22487798f91aba4b7fe08205d348e04d8bbc721de495678. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH2135723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab1a9d97d6c7a7db3bc1f16cf7391ade2168859ec25c04c57eb011096ada9d. 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/USCGH2135745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486def4c72086ccec4e9cc4c924a8de729e1f35444f10f0e21d50e0b86ca8bc8. 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/USCGH2135753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c0a86d370797526f83f82b293ed0e82a4aa53202087fd1999a59d42578658. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PYE762100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f77e5d885e50d4c216b21431e964a72c5f79058df29df20dbec65191b8046da. 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/PYE762100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6c0e350e399762bd4015ade8e6762d4d9c12e8a3ae4e8c4e1788081c65432. 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/PYE762100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb3b420752c06471ec875e1cbb91de1683e2f951a5344a01bd990d50864de6. 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/PYE762100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c9b2c24e49d2d763b14121dc6f7c328fc5a9dabe0d9c4a7a821c98d86a7016. 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/PYE762100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbc1abc830993fb59741a62390920ee39539e1319ac5f67f966158aaa590def. 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/PYE762100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867485512288d699ccbfc10cec6050de5c8fe31dab2199ecd7bc50c5d3840a2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PYE762100055.
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