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 0x1ac1ba67b81b19eaa81a5373a0284fc28c8ec49d5a581c90a38a0ff2102f6224. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7201eba4-bdf5-4deb-ae12-28d7460571b8.json and https://artists.proofprofile.net/proofs/artist/7201eba4-bdf5-4deb-ae12-28d7460571b8.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 0x19c1a28d02fdce371d563277d222a3d213f68fd276fda780da22c1b4b0d6f541. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNJY2367564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0963ad4e9eab25b1bfb1f0308f5f8d6d39c4baa4c93c4c459da648b8953547. 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/QZNJV2358282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1f15ab1c6eabd191043e0908c3382d6506c618186c0a8179ce14f9e27e0f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJV2358283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928a0f4f8ea90f7e1e3c63406f9038d7d5a04f146c68a9518e6b3bd3e0281f2. 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/QZNJV2358284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3ead7d96c133395cb01209086cabdf858dcfd6351fe575bb98a63619fdddb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9K2376034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b62be33a6c0b24d33a829e63ae0bab709ab915ba7d80a3957ebf9a4307dff. 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/QZNJZ2387267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91565282105718fe03c732d590f03bb9b503d20da0a91f83bf344ce42305cc7f. 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/QZTPX2372653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2496d014d4d986ed74a2262fc31dcc55831b9a764a3d60fb57401ec921422578. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:23:37Z), 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/QZMZ92487312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60042da477f9d99808097c1497da6de835fa5b8ae30f01f93a4f8112ba25c07. 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/USCGH2527244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa758db46094d6dac452ae56f17af99dcd6714e72ccf71f87ca6bb4f012c92a0. 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/USCGH2527245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8de70efa8093f58c3d0f9286225ebaff9aed53efd59fa727cb96a9c9a9394a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USCGH2527246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07897076aff575ebeddda0a1111ae214981315134d6a35787303516c66de2c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USCGH2527247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522818e1a47b0c8bce77977dc2250d36eda0f75eaa860f860cf18e3372bb3f1a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USCGH2527248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eec7f718658390747b7bf8aa34ffc3d7b29d1c90e817a4bceb3035249f8df7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGH2527249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e05b6549eb70d07e123b255522501556380bb5c095f95efeea96b2c162f2a0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGH2527250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91565282105718fe03c732d590f03bb9b503d20da0a91f83bf344ce42305cc7f. 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/QZTPX2372653.