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 0x34fc28500ac16ff95fdf9ee8480cab72d7ba1dd0be3daaee4d09644e3392e5fe. 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/00f44f0a-0a13-4de7-861e-6a4a97adfa7f.json and https://artists.proofprofile.net/proofs/artist/00f44f0a-0a13-4de7-861e-6a4a97adfa7f.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 0x27dcf5b966ffb414e3826e13905ebb912906d386befdb26ae3ea0eb47b6ef6fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XY2282073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb479c1c85a3903fabf66fa64818c555d8c57c6e1c5cde9df4e829725c8852e3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5BU2311793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db41fd48f284c321bdc0d470824fbdce85feccc0b9221000c3a3d0f8e7c1016. 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/SE6SA2201432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fd45846ecda35d2555ac9c14f61384442656a5eda0ecc1af452d0d8a4054b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE66N2246734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21be231518821e661fbd266b34ee0fd36d1877c1222750b9777d7adde4b81c6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE6XY2535728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4d97a0fd637abfcb023b99b82cb066c62fcdcf4452babade12164c2c99dc6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XY2590075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a6b44b55a5109aa6b7d04f6a69de8619986408641eed597fc900d3eefe624f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2535347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7767760e020a589ee722b3632a7bd69a054ea4602759a668664cdaf38f1ab. 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/SE6XX2575920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efa1415f999ccd90b156f65ae2323cb627111ca6f638f2322fca30191a00bbf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XX2528849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84ee3ff6cc4361c464151cded9f5402728af805fca967eee4b0c68c3c091b1. 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/QZRP42571157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373eee183aec9a81f3b86bbec69130e3b8990d6f32b12c532c4c30e1fdde959a. 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/QZRP42571158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1f1f26b34634a43aedc0832622ec902bde05785f8a5b1df367735887377493. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6QE2455436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495804768e506aa63b2a70d8644a418f909389b1a62159b690bf06e87c9e82f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6QE2436790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406828444103f08bf3e3eda4b78254beb3b9b3c653b9ce576449f6ae348bffaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I32442311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3163f1dd2183817b929fff5b9fbf553d08cfc3296e61acd18e03484fe9a82f96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE62M2290660.