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 0xe2262c14e103062c7e688e971816e0e52deb3016242a75ad8454cae9d6739ea2. 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/8eb4cf03-2c30-4e9d-9df6-90d509d5863a.json and https://artists.proofprofile.net/proofs/artist/8eb4cf03-2c30-4e9d-9df6-90d509d5863a.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 0x9b1ec88053bee29ecbc15ba7c02a4bc1d4c2ef550cb1c91bb68b83d3db7010ca. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRWNK0700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f301e424da7bd8a11f54e882f942fdd7ddcb71dc6e11933c2e9df0a21752c9. 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/BRWNK0700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c9af1079bc931d2fa071c6dd51c47900a4a6fef98301b5934d0666cd242bc1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRWNK0700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d097e0cdf7846242dcdf9990a0d5e95a108b9f07c565f3b03f1a9f80037786. 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/BRWNK0700138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bf7e1e17cfef29f0d054e0da71917519d3848359ca45dbaac33f029c959c14. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/BRWNK0700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22ed3d1e7a7fea3e7a578e9c9ad14078f25ffb5396d987bdfcb2a16760f3a3f. 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/BRWNK0700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b98279678bee20f1781c2c189451ac68706bbd0052933eca374caff9e95efc7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRWNK0700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4495ccbae67360f27bfe9b0ee4f4b15bcaea1fb26fff555e90cc17a009753653. 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/BRWNK0700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cbc0cd3c82f78d24e5624ae1043a7ad368a23d4997096160d1f9472c074c6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BRWNK0700144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e54b2e88fe57c32da251da2de96388ee21b7770a9eb952dd9c27f107c71e40. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BRWNK0800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b0b287d2868b24ede70668bbb8a9b3a125d1846ee4f562cecea6f0aa6b9529. 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/BRWNK0800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee811fb8379de4480e3ea1a5608a28f800cd73254f400bdea864f7d43dc9be74. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLM2028855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c5fc76d00595d4ea122c8029a4d8abe929914571802ebf50472d350c5fc7fa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZGLM2028858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa48044a01794f698f703ea4e21059f81a1daa4d7318a1fcc1ed518dd3422cf. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZGLM2028862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848a1e820d5d7d90e268ccb29690e8d762cfa803dd77a5f5faf75830812f9021. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLM2028866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248f5b03ae0264993287b5fe230e35a7a617084a5edf825758db08a22efe582. 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/QZGLM2028868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc0687c9ccdabf29cd8dc5f4367f40ee16d2c192a93773f109a57bce4519306. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7VG2439022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc1a28149ce1c4a2143c590e9c2032dd66557ada7d4d7adeedaa4dcfe86fb7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/US7VG2439023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a039db53fe039905b5f50dc9e3497d8565d09991daf3870c22b16e3773746c. 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/QZNJV2518198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86437ebec580f1df153d302b62687510585a67c03a9c618bed8d3b0a9bdbfc1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZNJV2518200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeed7009f2f86bb0568a9a86f4fe0605251a117db6a62da9c02d8c15ab2e0c37. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRWNK0700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87f8bc6742674bd2853332c3ecbbcb3f90e6a4d16e95aa793050d24fd3a2c95. 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/BRWNK0700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ec88053bee29ecbc15ba7c02a4bc1d4c2ef550cb1c91bb68b83d3db7010ca. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRWNK0700133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e208f0eba9d24bac6bd6f9a6512ad10320a98e9819672c6a2952e19030ed9. 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/BRWNK0700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c9af1079bc931d2fa071c6dd51c47900a4a6fef98301b5934d0666cd242bc1. 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/BRWNK0700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073e08c2a858dfcd404ff4908e3fea2a94493d9d7b3d5370b2d464c7730bd2f2. 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/BRWNK0700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d8c5003b90d047c67a5296fb90764485fbd5840a4ea66bccc25e1e34346c7a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BRWNK0700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cbc0cd3c82f78d24e5624ae1043a7ad368a23d4997096160d1f9472c074c6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRWNK0700144.