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 0xdf584120dfbf7d969c4dea744769249096ff5acc076423363fbae09e1ce3ab6e. 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/aad4a620-d085-4e41-aa52-0ab313c71718.json and https://artists.proofprofile.net/proofs/artist/aad4a620-d085-4e41-aa52-0ab313c71718.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 0xf2aa6c674275764910696c7afc0159288efb7eec6864f6490a47fc9adb7e77b5. 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/JPN101200923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7232c8fd2adc43831bcb1b6035a5cbcf7e7c157ba398e3a650acaac1caee9927. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:53:44Z), 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/JPN101201821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9d61dcbc61f8c1cf0fffaf6f4fcc0fb9481d3ae40f9cac491a9e67d34657df. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPN101201822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90550d03c2cb0fec59116e53a13e9580a2436741096449353601e613070197cc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPN301400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f574d096755e56c63f38427e1f9d8992470bf0ec5914f4c99634d941c7e860. 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/JPU901402154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe146171edd6e00bf73fadc14bf1b0c6bf0ab62faf6ccf042c065abc89efd076f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPU901402155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe498cf077b430e9d96fc8bbcfea7cc7f0fdc0e039edb4d31edea43fffb0928cf. 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/JPU901402156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc562bb2382f820005297dc9276534abaae6d317f2123469a5c5e0a305243cf60. 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/JPU901402158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6e532c443ccc6ad0e85503d62cc8399415c4f9e282d5473bab13f50eccebae. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:23:28Z), 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/JPU901402159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105751f2cd83e995d0e8c1f5d54e77e07e4b5f3148d99a321dbd6e0e95dd9c8a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/JPU901402160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5571b62593a76f5cc3b4a97402dc6c1e25379c74d747c88efd255c01c46527. 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/JPU901402162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57d136b97f76d93e74ee73e9941d7555960f479af8a69b0ec1f26550a0bbd2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPU901402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2a864cb21ca3cc852463202c4190e1250a2089e5f6231d9de0918a46dcbb5b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/JPU901502724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefef5f89b525239d2819fbe5158cc9ae8c712fa803bffd131b259f6d86df8cde. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPL2567516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf1db9e542ba9c9b3dd63b611a4d7d9e0cd39b6a0408e00a5f41e491579648f. 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/JPB602103302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ccd3bf7a3829466c9c833e6dbcb86f1506f36848410c8acc42c503a165d708. 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/JPU901401311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f95b32faad49ab8c7b80509424e81dda121ebf9e34430d3ee80ee6cb44b6e8. 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/JPN100100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b4ceae27a0a349d4e5a317956c169b5fe77a9a74bd9d2cba9c315dcbd0bca3. 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/JPN101000004.
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 0xca42c75567e353b2a80b39fba17144f7bba45eb96e4a0599b8d88e5f5f305cdd. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/JPN100900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f8f1155be1c104dd0ffc2e1e3a60080cf106d08884b475582355351a6bae5b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPN100900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade725ded472de0254418ad4787545155326674ed8bab2fb03a421a6e035044. 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/JPU901503932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2cc02408411c51ed3f391e2912e854c52eb1d948eb2a1b5edfcd9a70eab3f8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/JPES01301162.