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 0xc714ed0185249c4e70275120d1884a650a699c3f0ca6ca651d150b6b6a62a6e0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e00d8b2c-04e6-43d7-b9d2-768003f3c3f4.json and https://artists.proofprofile.net/proofs/artist/e00d8b2c-04e6-43d7-b9d2-768003f3c3f4.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 0x619e3bb2db4b9f52954683f2226de18da0c29fd2c0125b65e90db134bd8f8599. 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/ES71G1752686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34575de9f971ad595d76a079bbd20f603c64a6a66f32d10aa87d174aaa6a0b1. 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/ES71G1752689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad61e12c9a33e5b7ccbe512c643728a0c1b116a4b7d8f3d862b8abb9ea34859. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES71G1752690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f27b2f23703b3759edbb33e8ca8d9d5d182c5d08b29c5bf36fa3b2c936dfe4f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES71G1752692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d8b9103409c4dc32658362fd8c62397e8546f42c8111ea815852fc44b18171. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:52:41Z), 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/ES71G1752693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb567d142c04ea5a9fc29954559eb4db4e941104f7c76a41f0654b19901bfa775. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:29Z), 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/ES71G1751478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc353d83bff9024e93239669f4c1a52af51400957a497e285239ad8b9adb5180. 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/ES71G1751479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc84624691c7e400d5d09b3f350d1d64553730e154730886884b13eb905816. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:00Z), 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/ES71G1751483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea60cdd4b91f88ee584c54488ea6749fac70ab15496b31589310efdac2a3ee2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES71G1751486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c35fd11f27cd2d8e1207d1307c73a664079db452544c8e36c5db38a620f0e. 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/ES71G1751489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8ddcf7fb689542cff3e6a0536b56bbffdaa4f089b7ef36852399584ddfd21. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:33Z), 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/PTBM11900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e065644d6721255f563992c54f873333825c494fd24c7aa79f192eb180d5075. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:27:12Z), 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/PTBM12000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f555a37465fec70293d1176030fc86734e89cb7425b9561a86d75c0403d4af. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PT9GN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984a2dcfa95c6d2c8853f0f2ecddcfdaae32965e6475990a4870fef412abda1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT9GN2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1536cbf6fbef1acd5ec7cf451c5bd36151d71a427d3e61c2558267d5ed50d157. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT9GN2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea4fc4c3a7d8f1f50982bc69910f972d3caf26213bed8e34ce4636a243ac5f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/PT9GN2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c7b449f2528e68ae72ed9f1a4670ab66395e720609411f92b6f7dc4e2da01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT9GN2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958b3d6063f907912da8a8d841fd95fd37d851f302429bbddf942c0af36d8584. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRCQE1800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8299bd0c548916f2c9658987bf5a20221d5bbf44670f2681363016fa50f244. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT0HJ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f07ffac0adcca867853600a208746fbb69ce7b081aab944703ed2080a166ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT0HJ1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892c9ebfb0fd712f8ed7f797883b447ac93381024a38143fe0b254d7e100753b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PTUM72100505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0059905d8d1ba52ee9aa32d961a9b146575734c4a0f3196734ece0082d69e773. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2329925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9a41aef22c5eea0e648643adbd67b23428db11fe24260cd89cf818c63ad8f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT7RR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b346a9f42d6482e780f9035c5ea42274210b78e613197b7684554d8ff3cf84. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PT7QA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9a41aef22c5eea0e648643adbd67b23428db11fe24260cd89cf818c63ad8f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT7RR2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0033f7ee90999d996ea2a229240ad9a1a1033059fd782c62fdf002b7216c4691. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT6MJ2500019.