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 0xedaa4d5f00b2e485a7bf954f26f5da6704412efa6c1ccf8f09ab94400cae78f4. 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/f174cb11-1673-438f-967b-49cedc1070ba.json and https://artists.proofprofile.net/proofs/artist/f174cb11-1673-438f-967b-49cedc1070ba.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 0x6f37ae5f4426e55cc41e9bea17697c6c06645f30ef69dcc41edbcbf06ab504ac. 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/INS402001039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc4ffc0788aca80a44f430cbafd8e80336c2beddca8e3c104deb38f75f179d1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:33Z), 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/INS402001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd15e0e32d6d15e472738278732b027455c1ad7a3219736ba2e970b0e67e687. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:02Z), 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/INS402001042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910f8a1303c22197b9c1c7a5e92a3d5e220f9b77258a83f4592df6da934a84e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/INS402001045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f9d3942e579a2c268e49855d467084a0ffec9f64d58962f7ee472a66cb6689. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/INS402001046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d661354db66f3ca4b06ec323d6873cf6b6a06f1c314c2f3b0b7d31a2045aee. 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/INS402001527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd10659fc94847f7c8b501643dcfa9f1e711b0c1cc96e34abb354fb07ff5a66. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INS402001528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dac6a5d76414b0c100ec906dfbebd14ae69c860bcfca319534bb25b5a0cd35e. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/INS402001532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e21e2fe9f1a76ae6e105f5411b1dec1002fca77a27af946de02cce33593fc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:43Z), 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/INS402001533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4870277db5d1741f9f531fb4cfaa2dae2912b5c7e2d7664e05481fc3a647ee. 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/INS402001534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a08671b249a47e1f6440b78fa3caf1f86abf4ba8729a3df565dd9a93919e2c. 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/INS402001535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09eac4c5be927f30247d1f022bc52bd8d270e1ff9adce658910c26e70446679. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/INS402002472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb98e55a726af323f850b7a25a7e2720199a2b2c8eb585f22977ccc47155de26. 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/INA332000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8d7ec8ee6a6c64239a9aae2a65e2365d81b541598d982e6a425cf1e8d73b3. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:44:40Z), 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/INA331201109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f5f4964c3752a3babe28b2d84241e1679fc5032389dcdc3feb4b6ef64f84c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/INS402200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7823560326b54a53d08ee5a4f8042452b0751e949f2009dda97d6d45583716c0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/INS402200154.