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 0x99d30ebbf4ed5b21dc633059e5afb974de127c9eb97adcff5499881828e9658f. 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/2a37cc20-1014-4234-b34d-7bf41ac37ef0.json and https://artists.proofprofile.net/proofs/artist/2a37cc20-1014-4234-b34d-7bf41ac37ef0.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 0xc0394e1cb909c7c661f73f1a44a11145ccfd5e501bcaa952cae608274861f5d1. 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/TCAIJ2440433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f59152533145bba6dc5d52a5dc1fb50f59ef9519ffaf094ff6a94a0aef5f00. 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/TCAIE2400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db6d55aa4b76fca6d33cb4a5dce8f36e5af644e114a20458ab4901a33fe9d0. 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/TCAIB2421409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901d5762b664622da4bb31218ae4bc2bf33038280aafb2f043ac10be9c9fbe6b. 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/TCAHT2457658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fcb5dc5ae3d283dfba62161a1553c0395a810b5d35259f5ec9f1f193743903. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHQ2306009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ba67c1b008af767cac4505e031f07097b1914a92bbd9c1e669b1e76b769ae. 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/TCAHO2363998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd9ac773e49707c3e1bac16e0893fe3323c927cacc23afeeaf2a187602f972. 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/TCAHD2313346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fd153891bad4d59fe8cd8d0bee7ec77fd65a9e1538adbf8216bc3756c2b98. 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/TCAGQ2296026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64ce547fc447fe53284e5b037fb5cdfa989dafd732b99ab4c02d4f127d25b0. 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/TCAGO2202958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa87e47d40425a4a3158ee49c8f246f93c787bec691a51fcaa80fa9a527ae5a9. 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/TCAGL2282073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf9e6ce0261e57be0467ca6bbeb7a9fda520e9cbbd184bf8eef43cfabc64c4. 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/TCAGI2288494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5e3c065871ad1f4cdd0a0c1e4028f67382e86d4358a7ee0b5446d0597cc5f1. 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/TCAGG2242082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a32c80940f46672600704e214868b920716bd5da39e51aa17b40a69b3316fc. 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/TCAGG2216551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af0d446023f8a1c8833c6513057178b12994bec532da6be629025e46bff8b2. 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/TCAGE2205048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de65695a3fb38521c99fd29dfb9c9d439ffd30360cba4b006181e0579b3276b. 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/QMFMF2117474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0ced5adc1c17439766ba142d48a94314778cd3e241e325421738e2177e18d. 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/QMBZ92096451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b987f9b7ed3a0f4ce336246d708d36c7309028b18907e19f46f7120a9ce240. 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/QMBZ91964803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5ed1f01a137f7b6cd50af1bd99e8263c3f54011db08082799738069dada4b0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QMBZ91964804.
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 0x05ca149cb4325e80b548d2fcfd7ae0a623fa44cb2407e8a4ac9917c56321115d. 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/USHM21912540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38620cb5c6575bd35302fc45b56fe8fc8960e237df43ab553180517751c3429c. 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/USHM21889564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b14c68e92496a711914232fc47985aa1d40de921438202bb33d29cca595aeb1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM21889565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb693f39fdaf8b3b8384071482287d20d6eaea6cd4370da0b65dd1b1b1bf40e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM21889563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c492c9c7ac299d6de17559347ff9e816c097abd94737d28a93dc96d15b93ed. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6G2483315.