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 0x6fe13be886ca06be5c9c9d6169b3a4aa57eb6582cb6d60bb8cf8b1e50f0b8176. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77a59e0c-b2d1-4d2e-bfc8-8cb56ffd43ad.json and https://artists.proofprofile.net/proofs/artist/77a59e0c-b2d1-4d2e-bfc8-8cb56ffd43ad.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 0x2f1236f803f2590836cbc4ce55a8db6cacf65119a6fc3bf7788662a79f341697. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLS2081781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a560c34ba615a4939c5741f0f4c7c46043435c165e63334bf673c55022a2934. 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/QZGLS2081782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6039052e5eb53b534986582359069a86b8196d1c1494cffcf28593dbbe8d7d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2081783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f0c21cbcea3040462e263dfda030e8008cae0f7fc62b4417cfad91e7530e4f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZGLS2081784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd518086cfbb81d29103530e7337e43c2a9b367ff44c2709e7722ad303b988e. 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/QZGLS2081785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f592120d95cd0f77fca0a327209fda1fd44f9a3b82202233ec173c26ab0e5c3. 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/QZGLS2081786.
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 0xf63e76509a258ca89c01cdac6c21756dd347114a6a6aa56741ead1049b5533a9. 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/BR6NK2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39976891df25154dafdb592b94b7d0860d51cdbe0b72a80bbbf975c13039b491. 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/BR6NK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadab50f5885f208ae862a325a132279c84c1db63ffc14b23fafd73850f862ffb. 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/BR1LO2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321dd01ada47c7c2e5c1af17c97f579958d2298461d0aa3f3582ee076bcd8a92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXTB72300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729455caaf5371c5edf3326cd5dc5ffc3edb1cb0a6d0e0c9066c68c59a71a7f4. 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/BXTB72300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21a18a9e0fab2637e5a50881e1989c6aacc6504d579fe35156de3496015e32. 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/BXTB72300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd471d71e8f95880bb8aa82f1347a9cc55aaa98b68cb32e626c624d4645aff. 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/BKXXA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8dd0ba2619b91cb4e5a8e358658c4c209cf8a107c6544f326e15a6f31d981f. 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/BKXXA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa7e83288766efc9e893321eb00ee165a918ac0323d20c97add94ad707835d7. 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/BKXXA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf974307a26e0946cd0b8f2aeebdf5c846fbe0b6e0557796c46bd5717803bca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BKXXA2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8d4dc8891c9a960ff42ecff57c3b4a932b79763ebbb48c17089ee374d3c7a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BKXXA2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd5e6208cc5c43e78973e8751f1b533259df06add5efe9211a70d14fa3e4a03. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKXXA2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b96bc5ae89412afc00527bd8356d131ac6cf1f553a8b9ae8f29a34d25ef1b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BKXXA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d096c236f8dee9d15895284ff08d13d259ba308ddefeae96aa46860aa25083a. 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/BKXXA2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387123026cb8a59d375cb69436d3f56f51d9c395c1eba612a4a6efacea74458d. 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/BKXXA2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b45baf39d5a72304a88e71a67295b02d22426543432a0473df6b67f859b904. 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/BKXXA2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c69e14c0e89fb624a0e8abbfb0d08701bacb8d910656e659040fca04acbffcc. 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/BCGN12100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce27d475627e512c7bfd1c9b6b1a04c1c0c74bc3a7cb3409062d9e68441f5ddd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCGN12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedd383c3835c5de9f50ea5fb09011a91d86d80461d1b8225b7b1a6b74547b3f. 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/BXG5C2100473.