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 0xb0e6780fb25b5814f0d58170150ed9c91eed102daf0ab0c3a4f5a8e2bf58b34f. 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/4051bd0d-99c2-4a5f-bc0e-4d03a646778e.json and https://artists.proofprofile.net/proofs/artist/4051bd0d-99c2-4a5f-bc0e-4d03a646778e.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 0xba777f4dfc529b5a77682d70e0b99156f08af397fb947722c0c353eb84f042d8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXF147000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea9cd6a0427a06a27718f3e1dc10a482770e3c5bd34375fad4cf29e2fc5a29d. 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/MXF146200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba57e90b69503286f03ca2d4087028138c5e457a15b49595f8b26d96135bfbe. 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/MXF146200250.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034f6741596c98c17446fba8eb7dd367857165e40dca6df164ce54e421e5b4d. 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/MXF016200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9629146c15dd1c425f5cbd697868d0ddd218dc8f15eb1033528474ef7b2dd0f4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/MXF146100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7cd8d4b6889beec3e83b4e5b477bc609cae53c0b122d9072a249bf29777e1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/MXF148500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd25747252096248b37c15f3eeb01ca94625a2d7728b9dd18638a5c0f976fb0. 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/MXF146200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ff025651f11b5c2ca0c11b899895c31fe13636d7657b828d06b8c5483173ac. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/MXF148500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d77f414b3fa0bf6e1b4e2305314e09faffd194805c18f36d3442e211f6cd9d. 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/MXF148100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f2b99bdbf938d3ea0d7b469dfeb5f7774680ff62bc07394295c794ff92d939. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/MXF146300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e58d98fec9bf17533af3f303a8ead5ea1b3020f8aa19a4a73e07e7eb1ec7e31. 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/MXF148500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743a91ad9783a5e217f889cdfbb21360aa81365b708f79129023fbf0d5cfe69. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/MXF148500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8af3d216861d0acfbc7c07f9b084284a1d1050102360231f67e792a4bbf16. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/MXF148500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b924791bf2f10d9c0b054474b392fac490031f8f706a6107e757aa29a64703. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/MXF016400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb800e87c6c31af8d2c914b25a04b868d2451d05461d13971e8c88b59ee1d6231. 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/MXF148500400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02153be728816f16caca51a2b5f47fce302abf6dac65d44a350a6257dfbc2bfb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF146200282.