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 0x2f8c7943461b0509f774f272f1533839e990ac3d1d94e28755389741296edc52. 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/2e3e4ae0-aee5-42ac-bec0-cf3802f2041c.json and https://artists.proofprofile.net/proofs/artist/2e3e4ae0-aee5-42ac-bec0-cf3802f2041c.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 0x284db7e33fff1f9db72878c754dfd6663de1f3cf6bdf92469ab8d2d4cc7a2bb2. 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/GBKRT1153803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37efd030dbbf82b0aae2a1c918187a22e44255be905cd2457f6cb6140b09df4. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:53:29Z), 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/GBKRT1153901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b700f5f3ff58a5fb04e72048b0823ae26ca523735d13886af0b701bf17945c. 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/GBKRT1170503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc76818381c2fc8fa5c80df0360d20155fcba3f9688b0dc924819981a8b1ad. 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/PKA061704185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ae5a33f73ac4bd1a6b75ca8f4dbb799e45f79c5d7605b40fd666ed6c7fdff. 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/PKA061703111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b27f9a9f66c5c07107084eef0c83d82a9a1550e3f82a13574a464a3d20f68ea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PKA061703113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e15fab8ad05ea7e16312d0c06e1b6fa79b83b289821cee5034898f78b88197. 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/PKA061704168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c727e39edd0fc0275f7a3e4fddc6ab1680e22b84e4342cd9411df8e26124ec. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:15Z), 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/PKA061704171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f237d6ff720c685bf26ac1b6d840671c3703e71ab92f9f844f8f1438e8ee89. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PKA061704190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed3b3fe548c058737bfc1f980be862d4e2057963c16f59f7ba92436c94503e. 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/PKA061704192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90a30e2d6500fb828170a7c768b0f9e6334592554da1ebb776b3a62abb15f6c. 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/PKA061704197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9eb3788a04a570fa45982bbe2f1e2b1d42f80582d170aa3284ef2c733f1d53. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PKA061704199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3b3a6eb0d3b212ed407635951b75e9b818083437735bcbe05e75971cf6e5d. 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/PKA061704201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7631246a51323b07df8bf19488813870f459c183ec3075526a32947ae3541d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PKA061704203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464321075829be71351c975b910829cd8fa61d5b0e763367fc468a9844bf30a8. 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/PKA061704157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09335fe048fac6b9e58b3ee135960c793682e4b85552f65ac36f36b20d80dfc0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMBZ91566543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea7c19a9d144c91fdf1a4c96b2878d63894cdf4f741c31cfdfbb35b6522e75. 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/QMBZ91566547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f7babd401f306c349a0943313e7eb9bf11fa6c32a015b1abd803a672dd062f. 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/PKA061768738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db91916497c0b69c20e7158b1edce722ae340297739df4f053b2af9f4244da6. 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/PKA062105504.