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 0x0e2a000710178e01c5a36526bf5bf4706857f1a39f56af256ef7487d33265ea6. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e41663f-4b52-4795-bfd2-f75bcbbc6faf.json and https://artists.proofprofile.net/proofs/artist/3e41663f-4b52-4795-bfd2-f75bcbbc6faf.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 0x4654cfd4681f14abb43ab7bde560b25be5d9e18eb076d003667e79991e2b0784. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:40Z), 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/USLZJ2207678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fda257b92f2cf93d7257aca6042e16f332c0533224a91f22c226275de48a0d. 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/USLZJ2207693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf15d6a076ae05deea93ebb61e234a3590ce4775959cf256c05cd5622af6749. 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/USLZJ2399327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8539a1c364c12275912dbbbd01740b2e4c940e195e2327fd082d8b828dce1865. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ2399390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b3321b944fce7760b4f9b3f7102bd7e30314c8a6f1c252c400dfbffd47316a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ2399431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c597ec3c61711aa67b1252d74c41ddef65dd73dcd1257a7e8c8588117954af. 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/USLZJ2399434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508fa0bf7b322675d9d8966986d706c5ae572f607fc3d5c10d7f60cbfac89cc8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USLZJ2399292.
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 0x1c9a0d0ebdbacd6f6bdf869caca241f62eea6ca406dd1c3fa60d07f3adbe0968. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USLZJ2399299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf7d37dbfe706e44ee243edb8ef45a7cc28b427865e3fdb0deb6c504aeb4ea. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USLZJ2399302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5300d95390a416253d7e1743a529c0bcf65e0fc55c4fb49dbbf3abe5901904eb. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USLZJ2399337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868774482d8dcb5b49536c8cb8e9d29cfbea010eb3c2256ac54ba71c2d780deb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USLZJ2399343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f1e6a6dd1ae8ce5e4303bd045e0c58ef1fb448798e1d198b5a72c19c76455f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USLZJ2399384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ed72371aea578e8f4b5df318d83823086d7b6f2d6f4cb5773461f71a744c9a. 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/GBRKQ2428007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f09db47c9637c7a5a73ba4dd3e31e8e958dffda89ec1f93e56a02db0e367c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBRKQ2428050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb5e5ddc268174e8e20bc483d24a4e787b4c4a1fe65f3d3d3667a48da0920f3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBRKQ2428077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d5180c1082c816e35289740c929caacc9a1b3d86c3e82077965930262a179d. 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/GBRKQ2428081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3d0d67687767f24beaaf5837b55fa36138c725e298c1c4024508cfc69de09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRKQ2428106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a37c9391914a6dc87b54d693e114b854aca9624bfe14905703ecb37a80f78cb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBRKQ2428049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d7eb27cc90b001e5c54af8d4d9e921e7f9c15150dad6ed6aa850752eb9667c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBRKQ2428068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68278db7a2c55d2037d4a1c92f9cbcf4b2cd9efab6059537a0d8b1434ec61583. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBRKQ2428071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4e95a2e049e4b41f31d0eeab832851fe3322e3cab7791614c172bcce8682a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBRKQ2428079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0701575efaa314c3d178224b75c8157643150272bf08b2f5cb4c64ad2a2a1c7e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBRKQ2428091.