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 0xa6cbc51c81626cce265e4575f6c8952ff43d713fb582864d6471176376e79fc4. 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/ec3bdaff-37ae-4dbd-9dd0-cdd6c82e5069.json and https://artists.proofprofile.net/proofs/artist/ec3bdaff-37ae-4dbd-9dd0-cdd6c82e5069.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 0xc67b59f23e1dde4dd001fb70e8bc7916d2c1c07fc8e19f417c25add44ecba0fb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CZA163366406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a781915b8689120cc7b47479ed11a07da5292910a80b7471ad627d27bfe014. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:17Z), 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/CZA163366408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6e0c67b6f8687b3dbf828bde190f03152a9188fbe5d675459429e7d09a1df. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CZA163366409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb17b4e106b41408e06aa98e01a8715454b7bf651f879a1a3b3ddd76dbbb31. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:08Z), 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/CZA163366410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337e2f7b9c79a7448b80a27e9139866fc661b59ee23b256ad57f1791b42cbf7. 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/CZA163366412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dca69b9f65f2c0c676c2512d70e00b7d9b2fe70fd96cf6f44c06f80034f7b78. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CZA163366401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44abb4b7db706dc79e90c2229fa1f14018169d26053a2e21b8bc2888f0cd6c84. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/CZA163366402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7db023c6dbc3ac0edc3c1c49530bdf536eab0ebdf95a69f1575e4cf7dbfac9b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CZA163366403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d25a6bf53e068f6e55895ba35ad3e0492605513d99f3ba33d24dcc605b08d1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:44Z), 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/CZA163366395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2735fd030699a29240fc7d34179d5fcf9c392bc4c2d04aa81fb44359ffa1c76a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CZA163366393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5933da247baac629965f7b68d6e4e79b52d64ad399a82472cb32be0e76c855. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:03:07Z), 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/QZZ7U2466896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14650810e68671d76e2ababd882f54cf532d6b1c1bd57dcd60a3e27dc0c0b0db. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ7U2466898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb94a3e9385802d05c483d2cef1ff82ddf633ad7416b99a78f04db5ef8efc66. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7U2464881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda06d81f90ea696ec566066313b3e5325995b5c54afc8fb22ee4d7d5b041abf3. 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/QZK6M2550655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d4a7af0b937402dd248404493eff3fddd0494ffa686c813a4d9a9c06b6067. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:10Z), 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/QZK6M2550656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64300a42bf2f5be8780ad416a59693c6fe99a9f11dd556a21f4aab5dab03a425. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6M2550657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ee12ceb65cc9a3e86b8a8c507087712c6f7ae90fe8c1e76bab22afec9de077. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6M2550658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea29a1b2a435b9117b882299faa10440af0b7df3ea867b786a087f56a32236. 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/QZK6M2555931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f4e61ae9a1f22bb8bc0764b3d710dc0dd34bff078314f5c113ff7e6ce01ad. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:15Z), 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/CZA163375624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2eed1b8902ac342b62591dcc57aa5dd7cff780fd0b509540d6453930ea4967. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:21Z), 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/QZDA52321778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b662d8fb088a19b89e74e6afb6de32326f945cfb1538cf4a52ba88a6a79d57. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:56:59Z), 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/QZDA52321779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1f327b07eab9e024767a340da6135d5a7cc1057e8146522df4dc8f4072b02. 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/QZK6L2598013.