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 0xbb4798083ef5563b0c44dedf9dc1d5bcfdef6b37ee88504ed88ce0e6e57adc36. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74b27e3c-f571-45e8-a82a-63011a3a4f19.json and https://artists.proofprofile.net/proofs/artist/74b27e3c-f571-45e8-a82a-63011a3a4f19.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 0xf9f1778df83d55c9c846824fede71fd8d08e8696ed26d6162a86b8c3f45538e3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLLT2344883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21fead513053f95cc3b1a5970740a72e162dbb3f655856d7df00f17500f11ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLLT2344886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8641e773791161618cc468cf4dc709356264f0f5bc214f7ba7add1d37428ff3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLLT2344888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb32fecc71bbd2ee5a8971dc1a60a21a97993dca303652832192616713e4f78e. 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/GBLLT2344890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fb42953c4f60f0859f73b2c891a8df8cae99964762c1cf0a6d8e9e3b0584ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLLT2344892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e56c129ec37eaa836c66320c9f49e57c5d557178ab60d2c5ee74e3c6dfd09. 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/GBLLT2344893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808bae9770acff6530f4b7b402771ce17bdb41de182c0ed480a74a02887fca1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:42:32Z), 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/GBLLT2345323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992d9f2996dd3edf8632e7d7215abef0b9e6af0472bde4a1e1fb78e330ddd43e. 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/GBLLT2345328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae62fcff23eb4711a37eb491975f4d6b66478aa8b203fa5ea8351f0f846e76e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLLT2345329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b9c016fa441d47f596b8e76303ddd892152152e3889ae0303a1eef0f483fc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:44:40Z), 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/GBLLT2345335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e75a3c489f99ad161e41c9926b404a912e5773456301e5cbb2d04e1efa420. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBLLT2345689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9109b4ff731450adc033bc8c9e4596da2fa63d853ad6a91cf6b665e1adffa9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBLLT2345691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6063780569d41f1e64d92482e06a43cf824e031f35bd5f2783ed9b9cc3f38f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBLLT2345692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe913cfbaee9aa0b5874720f2ca4d316a983d523232501af6695560ee60e881b6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBLLT2345693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ecc9a51f71d213f802dcf30945b3a6ca31ffae56ba3551217f8d1de43be09b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLLT2345697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cff72398e416b103d5d82c772fe31ec390c53c99ae958335d876a16d63ec2c. 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/GBLLT2345699.