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 0xb0b5f5af52104d4b758488437d6f64b59f940fa04b518d314f8c8d5f6e49c3ab. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f0f28bc-ee03-4176-92e6-884798e1dfe0.json and https://artists.proofprofile.net/proofs/artist/7f0f28bc-ee03-4176-92e6-884798e1dfe0.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 0x2b2856d222a6ed6ed005db653ea874bca27ebb78e55491f0ce58e3bf1b914775. 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/QZTB42500992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ccf2ce4abe75fb4e863a9e44b1f65ac8ad1e3c05ed003a65a6941d0d14fa09. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB42500993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f91a5cdc5c130d0ffd79ca412600e26861c162017883249ab4f3ec6a0c92ff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB42500994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd741af734962ba5cded44855ec6566da1a5db659dd46f6f8e92db9349bccd1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB42500995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f82fdf195c5547106f2640a9a321118bf2e57da0b86674cf09855dae11bbb. 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/QZTB42500996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5753aa0b4a6f0dd3deedc68266553f82a02105e0fbdebc27e5795a358d8658b1. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTB42500998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9c475dafff17bdd7e252a023fb838781f2f33ffb4965c41933ee0752a00be6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB42500999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e06466143f5ee6fd16fbb5880a94d31a28be6852ed4e1c2ce38df905ea240d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTB42501000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28946f20c3ad7d842bc3720f7903efd79488b3164340154f02403d618732d4a. 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/QZTB42501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195c66f6a8fd2d5474e55ec9d7af4a1f9fc177bccb4317ce7e6623c316fab62. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTBB2541912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a8b0b3aa7ed846812485b16135cbe7bf8bb620b05a658454d3e0df7dec39db. 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/QZTBE2536869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73141e550e76488966c84413007a1e68411f6efbdfd4a951f92e3140ba58d4b0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:29Z), 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/QZWFK2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1831e90526241c63b81da796c2f96b5db0e1f3b2df2b348e8615542e32c8cf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:28Z), 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/QZWFN2561121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9724de4068799fce32dbeb95fc5d75f4428fa7f9471797ead55ea3b2f9c443ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2589599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bc48659b08d7da4d6e9f3b6eb304781dfd5a692b05ec7cde13de7656627b29. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7Q2506159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b50cd0607deb807a66d77bf1a40b775b328eb19bc92d3360bf7df754cec4be8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:36Z), 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/QZZ7S2594297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc732dc8932816e2d5e6d15faa2969b8d46fe3bacbf4fe2e034f7aa34c0b7ab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3EX2542625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753c7f7513defbb63686a9b1179c5b738b00c3435086f19dc7acbc5208c0eaa5. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3FB2538073.