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 0x1c4213d81b7f58b903c64f5045a5cb1670e555137c326268950bc9d42320aacd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44cba1d0-610c-4e85-8ad3-5393f0d23165.json and https://artists.proofprofile.net/proofs/artist/44cba1d0-610c-4e85-8ad3-5393f0d23165.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 0xada09d25f7793b7483615facbeec2f6b25d9c3308c347a07c92b5edc2df832d4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USSD19902631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08742005a18fba58d6a29263c9a54a86f5867d05b703c7860af146c69416942a. 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/USSD19902612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67034e3dde50bea2da349d5dfa1b6fbb47ee958e1ab29b22e3ecfa9097643e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USSD19902619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b9dbf5e26783d425f2ea2e446ad0af3e41511075f03ddb8cb49b742cea8e1e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGH2566828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511db1aa70b272431f9bdc055edeac91e182372f12301f66d2c80a2fb7a684e3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USSD10204073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd831b0f240078b6d5b68d460ea6ee7db78ccbb158fb1932254d0535030f23e96. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USSD10204072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a4412e523903e3d3eb5bfb41d1c75205df205904139aef708c7b6d39c0700. 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/USSD10204069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd3d9e31420e4b5ae0b99a4f90221c1dc3872449ecb4d2f1bc83212883172b. 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/USSD10204070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b55f956d6b3e3a0341a08da44c1bcfa57b7183f625c13c7cba116ded9c062. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USSD10204064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c898fcca7db634836b27c9977d303b5c912bfdfc7854494bc37de9e51feb59. 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/USHM80992476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563f0bb021e50652c49fd410a6bff7333ed5c985eab32d4eb11b5afeb02f022. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USHM80992480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851a610c554ffa91c6d9a91b2b24157b6b6cbb96e794dfb1e7009cf0db54f43. 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/USHM80992483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145edf49b5f234447d227899209e81a6a7b343a043364afcde05188740b9cd4d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH1285430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d28fc690d411abe37365ee877b224f21c53f7c0aff199d8cb82727fbd24038. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/USDY41667834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162b3dfc97fe87750a33e32e4b20d294f137ed3a3cdd078d8f03aa75b01756d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM91809471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0682a0eb7b7506b60f5e1eb6cb17acf45c4a9c5506ccd59ca46412b9ee7ee9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USG2M2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8433ef6f7074495fa61485fc7b7a8ec857dde7870f2780ac4a7f83367acfc6b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USG2M2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8433ef6f7074495fa61485fc7b7a8ec857dde7870f2780ac4a7f83367acfc6b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USG2M2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b91c4bc20c893f4c51f62ad33be3452b0d12b824c425a0eac9210a13c2715. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USSD19902620.
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