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 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 0x23f1232c4508348654fa5d37dc75aa6af741ec2fa8a5272672148a44e244aeb5. 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/2810d49f-9db7-4629-8779-054f5b402acc.json and https://artists.proofprofile.net/proofs/artist/2810d49f-9db7-4629-8779-054f5b402acc.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 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 0x651cb5cdb6796735a23a029a1ceb684b8a57f9f90ea51634e37aad82a30c4777. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2539498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b7db768ee92ffd4fab0273687fa294afbeeec6992ace2529fdfbe744dc4699. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZWFP2539500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa3ae7bf053cfd2a56e5e3ada22e03ed2fe21e1db323e0d8b8dbfccdf5265ce. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2539506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea551b1f03fb689d77ad0f211aea7439260f86c7c577c529b72a66ded4cbd4d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2539507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518048461e97330adb75f855611b8ac34502d23fe2f74a92946aca081525cb5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2539497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15595c974fd95ad4640ad30db70c576563b618162ff3b74e9550b95b3f1780e6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFU2544326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f51fb548caed283e962c2f8ed133fa28ae54a704ccfdadb6e82aad82ff21964. 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/QZZ7Q2581158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72aa22cb3a153b4532200eacb20881e767189485a021562b1808b946ef6b88b. 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/QZZ7Q2597337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc06aa7a69b4bf0fb3aec8f7bce32740a0f1e959c69eb034d07c8182b8ebb7e. 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/QZZ7Q2581179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb565dc5fb8537d55851617dcf5066d932f07fc6a702147a137f8b9c3f63168d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7Q2597333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3afe824325a2832ba052bc632fc81e7ad40986b1236774e8e9574c93c392cc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZZ7R2544670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5a69badb63a7d366417dcc569128be2c6b1a219d4cc5ea5202f029d9f19ac3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7Q2597327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3638ac7869e5b0fcf2aea76383a1fa01a0001f9bcadc7609ea4e43fbfaae61. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZZ7Q2595073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f22ba21cd5701ebd9db381319edb3e78fae1a2d852cf4d672dd2c71ca9da92e. 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/QZZ7Q2581160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e14c386a9ef7fe234fc26558ebc9f24470d0e9d43890c6362976d955bc0b8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFU2568851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81c9d7b2ec2f1122c60ff3e5c3ecea0702636e05b5ed8bff8a24f27c2209e4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFU2509557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa639a0ed02ed90d434e92cb53be030e7fd479092d278cab3795b1e98d0a3d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFU2532679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a458b3e2710ae3903725e04220dc84d3aecbdb78a749c2524d3c946cb3241. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFU2535105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161932f2dc020b6adb1ad41cd1cff1b1a6770e466534aef37d9a880cb0450a2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTVM2484439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593098a156ca5fe52a5cdaf75130e5fa3a0665c6ba8436d8c5e3c9ab46a346ee. 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/QZTVM2494632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f323cad302912ac693e16f65193d2d9fddb92c52203a1c4fa8fe92088b20c. 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/US7VG2277937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e59bbdb8139ec52652a5cccc1562568652ec52970d8c60b77e4b71ac24421f. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QM6N22289299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b54c7eb83c840d56b7a0fcfd0bbbc9860adc49bff70c63ea2a454b07d1987. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES71G2412021.