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 0x6c75bccd54a83549b2a763359dd181f6e69de1fdcbf18463c251cfe7e71da73f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb25eab4-041f-429d-af2e-247579c87e33.json and https://artists.proofprofile.net/proofs/artist/cb25eab4-041f-429d-af2e-247579c87e33.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 0xfdba86877837030907e536ad7b455248b27081ff7fd1f2be46b1eb709c1bba35. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM4TW2111428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b30f8d0fe8922d0addb67398e871eb776b849a1172b263490796e5f6351a45b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TW2113018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feeab51410537c8aecf2bfd6615a38f589527323aa98c3b1d351a0f3381e854. 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/QM4TW2112992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cfd12a5da16f532684e1af7d38c4c865ea377114b7048941b96dd68f279113. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM4TW2113019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932e1ba526b61a7b226f4544922d2f6d42308f4ef0f5edc4a72fb2f479228cbf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:40:28Z), 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/QM4TW2113033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b0c7246fceb84b079178dcf87526e207e6fc1bec1b5d2b8828e0ee9f260640. 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/QM4TW2113038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef5069ecec8e9113322e8526af823c07e7093c8b25245922cd15efe10b6c71. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM4TW2112965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ad51eed1c0eee9c5bf79a536192d875cbe8916c7ef1e825b714786615ec7c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TW2112970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aab63eddec521b76ee04dda4257c2e96b82e003ae4a0c61d3723f229d91c6c. 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/QM4TW2112976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629ce615903295d2966b21bb59d50b48c4716b45e6f7d638d1acfb415839dd68. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:44Z), 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/QM4TW2112983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f16bbe66a45a9c129394e023a8e8a9dc74bf9bdb7ff43c80377e21da3d6e84a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM4TW2112989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3720eb05222dd4f9e5188de0139a23a1c37d05d50a8887e0e55311a0ca9fdb0. 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/QM4TW2112990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182bdb8a1759db5f84e20abad2159f9dbef0b3cbff23aafb216ac0f4cbd380c. 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/QM4TW2111384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7da74a282446dec26e5f12514d03da7261c590c4afa2356cbeb1d84724a3c. 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/QM4TW2111415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4dc7ec5c36a3e7c2a2565ebd07ddafa3f3a04444f77b6f3a9e9beabc9ea96d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4TW2111265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e09978398ece9f3b8bd544c3130a4b90317fff1ef130d1472b535bd0c43097. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TW2111271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1faf4a779632fcf33a332cca861a7833499b4b5a288e25c6fd80484a8cfc50. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:52Z), 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/EGA010544696.