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 0xa30251a1acbaefcb78355cb0f066a73f99f6be0679ace5ab8549f28af6cb014c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e34f784-9f0e-4b03-8a1f-d01691007379.json and https://artists.proofprofile.net/proofs/artist/9e34f784-9f0e-4b03-8a1f-d01691007379.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 0x925c020f0b589b36a972f603bbba94c2d6c44e3765494fdc7f88356ddf32bb33. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USCGJ2535795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492806337fd80770ae3b863826ced5931cd822f8624deff9cbe7c9e5586717af. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USCGJ2535787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962d99e9b6104d2ecf948d9b5cbc2aac67be61254ab961d04b4ae4f22beea609. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGJ2535794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a9d749b7c2a66b20909c1b5ea667b967594cfe8d5dd4aab51542cc5043eefc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2535786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f49b9f2805d219556e07abd41082bb3e76d13fee7362612a03268fbae84e2e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USCGJ2535788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3403f1506b791ed511270f4e015d0f4f995e76b00df0c567ae4bf47d798c078. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ2535789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977beab3659b975b401f84490dac6d7f17102c176b8e8b285ea6163b9b274df. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGJ2535790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0536f3242e475a8997b139a158bc2edd1d824407c2ffadee3238dcc31356ff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2535791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3999dc9baa40ee5cd80fb154ff489096ecadc8798fee15ae9ed50d9e5d2b67b1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:27Z), 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/USCGJ2535792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9067aba474713105f8c5c0209049fbef3b9656f9373e2c188a7ad3912c5a904e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:30Z), 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/USCGJ2566934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a497ed7c9f2bbe51c4e9f05706703b66a4008d8156add382129d484e9913749. 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/USCGJ2566935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07e1edb207ae96ff997c7fcf53d0788db2893eaa7f2a85b39e0f62257ab0739. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGJ2566936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dfa446c3837cf3222407625ed589e38d28aa5099a5b28985f7d583a9e265fa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:42:29Z), 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/USCGJ2566937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90ecbb778e3fdb7e2e895df98672fc687410ea74cf44aef9aa72f42b5dac46. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGJ2566938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041a851d4b2af3edd3a2be3d6416e3813d085be5c0ac34f7a660f2e8c007ec2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGJ2566939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b4d5ffce71e62093efb4f5c4b0faa75ba07f2860fca478d5e95ef18bc91ca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USCGJ2566940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ae4f589259aebe4e4e52a0341ff1e76953ac79adcb222b4a57e9db72261a7a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:00:48Z), 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/USCGJ2566941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cf212243d31c7a2917f9fb330b3b2cb6e73c075670872f63a17d62b9afd9ed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2566942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0acf52c26c1e3d47c964a44bb4688411856443c91a5f43c30eaeccf202cbc46. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2566943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e220396d53b63105549ed33ae6bdd346732bc490098b459dd4c06ff8fcd333. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:18:36Z), 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/USDY42504128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378f1ba2c3addc4fca40cde426d504e8926f5361cc9b9fbeb52c02d35a131a9b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USDY42504129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc840dfc875ff7cff642f28e11d12deedbdaebbda467eeadb27e3a9be3b10d16d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:55:07Z), 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/USDY42504130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13af611d3c52929097daab6c20eaa04c7c91feff1fbe803d9f30fa3d79a21905. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42504131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dfd93e63adf04833d43194b598405ece1c52dc165b2b46c27a6d03efefad2f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USDY42504132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ea88cc57163d3ed7c96d0c5aa0ad0b01a0d33d9e83e46b7988f2460973e403. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USDY42504133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416eec786288cff62f9cd11475027d6e0e41aab01e904e60447f1001d32fa06. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDY42504134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe90922dad86123ef406c4f32563f0bbef1daa156c5c8a81289e619ecc00803. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42504137.