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 0x1ae3bbd67dce4bf8badecc1abf621ae9ac771fe841d92d7754de101d3d96d2f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c17c8ea-ea53-41a6-b749-416a3ddfa107.json and https://artists.proofprofile.net/proofs/artist/1c17c8ea-ea53-41a6-b749-416a3ddfa107.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 0x0b4a8c947c11942503aea1349a64fe5bf7ad872f2afc884655d12bdac956d12a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZEQU2043191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bd26aa268f5ab3684a5f310f8df50788981eab09fdb45c8ef1394cc41f0b33. 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/QZEQU2043192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0be134da6811a607ad91fc0b7ebcc3cfd4ed7125222bf7e5fc60bab2f441b1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZEQU2043194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09a41d4f1b77c757c73e5745667f350a2d402df2959f3ae4945a67bcb3c9668. 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/QZEQU2043197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe068c5209665b11ce53a7111b25ae0302824fde087f9f7348adf8180162c69. 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/QZEQU2043204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060a1fbb2947680ce6c0914c772786da45eb04607434d9268a37d38c920311e9. 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/QZEQU2043206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4fffa84d8521a8b5d611d924b528f938c1d3b0f29a934c0f025228ceb86521. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZEQU2043209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcae142b45471a56b0b185a3342b7b6cff9be90652d2a948cd8933c7a270d84. 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/QZEQU2045860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6bbbe4ec82998a70d9aed0e34158443dcb6a58b2267b911946c0cee1939d87. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:59Z), 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/QZEQU2045863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3a6c7872273d22f4fa8b56ca9817a70bdcc63d798abb572fbb7a3507e80e92. 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/QZEQU2045865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757c1368941cb86356d5186c0e2940c546a3db3f9223457ec960ebfd780caba. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZEQU2045871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7eec7c4378f3c0f587ac33d8d3438e5208e12eac890eb3b0e981157f4acdf. 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/QZEQU2045882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f45034b896905d91a45d8530b58d24bcbbc34452cb2e79b0890c98f61be644. 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/QZEQU2045884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678d2d689e28dbd44bf78536cffd71e2952f9e7c296498844bafd84f06f62faf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:28Z), 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/ESA112431259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c343c631ce8e990d5f67984dc3c453f9e12268f923423bdad0adead1f13f44. 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/ESA112431262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fc03185a685524d83aeec950321e315ab8e2234f86dd4ba45b560947a999c7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ESA112566128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a93604da6e02134ff9f63a0447ced7f3e31598341c0702fa1089fb74c6f14ad. 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/ESA112566129.