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 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 0xbb5b6ddee5bfe845b7b35866e06b29e051d4dccdf8ced6105ed4cb0e4f31c3ef. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e602e7e-01d2-46e9-8aac-126a0b7448f2.json and https://artists.proofprofile.net/proofs/artist/6e602e7e-01d2-46e9-8aac-126a0b7448f2.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 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 0x4c7035f14bb1e0167166e97a83f2c54d5f94a5c18ddd642fe23a1de0999261ff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DE1EJ2402961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740178b1766765737e53d9bb6e18397d5497491b9916491fd00847f64e196526. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DE1EJ2402962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc40c9c0d7e199e9f1f76fffa8f35b1ef855cc6f2b242111252810a33e8d5e. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DE1EJ2402963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587fe00c4da649cb39ff3bb4cc1a30035a9d2a0b7a6a78e9e9990f955469c5db. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DE1EJ2402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b0d4ab3e75ca3a9c1d4440f70b4850c862e0dc8cc61a12ad475a3cdc7b0d9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DE1EJ2402965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd38a45eed7611ba6c4472856f52cbd16edce448ee5b846183a6c8e30c767fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f6a6957cb52bf18d5345534a3ae60090254fc2a293d5b64b97f9cdc7e5713. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DE1EJ2402967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67d791ea4ba07945228c0466ccc3a9cdf8de4c845ce3d09ea2bd2eade36cc67. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DE1EJ2402968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc372c7f9db4b44f177e78c9173bd4def58149903b6d1fe61a146dfdbba508b37. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DE1EJ2402969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8b275de01543de39cd9108d013c627ef6cb5d88b21a595c16a27348a914c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0037bf78df0e66b0488bb4433cae5d4c9532bee110889796569e41c450104. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ad05602d3b97731e74fa2af00f2a8d73f212d7bdb7ce6062d05a9fb82e813. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DE1EJ2402972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3deac9b912877b42b791bf1f1b7e5ada16589c75c71d13994d2f1a656c7ba0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08ca1163ed03a721f19e038d328a599a47963938eb4dab249d993c39a4baf61. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DE1EJ2402974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feb882f4ac7ac278cdc98c3202467c2dd44e6a696025dab58ddcc70d6b7220e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DE1EJ2402975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f12a00cde50e9e0e0f464fa806892921893e4b6d51de09d506b0bec29c6547. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DE1EJ2402976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ed6c943f4454dd2f6797c109ca687bc5a1fddb4b8c3c1f3dbafb00cee822c8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DE1EJ2402977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ced6e19482021c1c5ca21e005332175ece9cfed2f507e84eea5d75830bcb167. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DE1EJ2402978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9af4031f3710e9d7337efbfb9775ac59763f5b42eaf7be02ba998994eab3f45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DE1EJ2402979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9250de97c0db438784d6d923093a85178b8ff222fae2cdfc0afe0a28a2455f3f. 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/DE1EJ2402980.