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 0x063bd3896d8eaa336afcf797c28adea8b3c297de8d12774f5ddb40edb7e5e06d. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d559827b-2dfc-47b2-82d1-9e0224f445a7.json and https://artists.proofprofile.net/proofs/artist/d559827b-2dfc-47b2-82d1-9e0224f445a7.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 0x8dd4a7fafa489e901f00e4bc8d8bb005d33fa7f26fc1368f2059ed0fbae8e368. 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/QZN882564480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a7f36bc810743c981c229fb3c4f44c622b60b58ffe9e17b202e5cd1e85d21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882564481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead35f9a55abb2cb803c9251499431e92dfa924d28b6272744cdd9ab07c6cb6e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZN882564482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505870233fa490f25037f31aa72a3495964cb870e3800dd469d4019e0fe525cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZN882568959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e950a007cb34219f2c280ac1950d7acf037ea79eb6d8b990066bd6bcc20ba7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZN882568963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd422558f3066d78b42c8e7c55f96816ae752d7af3d376ce64e9c6f823190fb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZN882580749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf6b801ce62053e6c706b65b996862294476dfa3deab90afa230ee5ee95e50b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZN882580748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f4007109cd1ee4734a5eb5d2899c4d3064dc8958e0d4883be520cdc7647e3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZN882580736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf52dab490d048407f1e35484e40961385b08c15f5e18a95320286ab6c2a06. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/INH412407977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3836fc4016b791c1d04281e34b295642367603da8f2950b7026adbde82bc035. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZPJ32472517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2500658d3e1c4a4a5c0bd84af5138bc31b59d11380aaf015a5b3e065a0e91c28. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT4K52519071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9c6c1f6c7f0786c314175294020bec05293bb72d13e12b29cbea374e571bf. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QT4K52519072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd422558f3066d78b42c8e7c55f96816ae752d7af3d376ce64e9c6f823190fb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZN882580749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505870233fa490f25037f31aa72a3495964cb870e3800dd469d4019e0fe525cc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZN882568959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f4007109cd1ee4734a5eb5d2899c4d3064dc8958e0d4883be520cdc7647e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZN882580736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf6b801ce62053e6c706b65b996862294476dfa3deab90afa230ee5ee95e50b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZN882580748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e950a007cb34219f2c280ac1950d7acf037ea79eb6d8b990066bd6bcc20ba7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZN882568963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead35f9a55abb2cb803c9251499431e92dfa924d28b6272744cdd9ab07c6cb6e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZN882564482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab538198f6dbfca0f4b1dc14d1ff151cbaa6348b4ef97dca1567375da7ece2cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INF512503079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f3ca772b389eb4ffd17ca53fe9cca8e279874ad6b205fc2dc767dad1927dad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INF512503081.