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 0x089a1ef4d4178541c1107016b285d68c8d8be7f21e894fbd34790f1d8cf63f06. 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/bc43f688-2243-4bb6-9f9c-3474f426da9b.json and https://artists.proofprofile.net/proofs/artist/bc43f688-2243-4bb6-9f9c-3474f426da9b.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 0x39fd321a02ca8e91b0b3e948fe19153c68ee1b06c445f40ca7e8e3b28f83a18b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN72186626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0582ca5e054dacb1b54ae70df44a35d5dd65786d515f89edaedb2b14332dc3bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92134244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c91ea5ff9bd6c6155d08627a471d15119394bc3bf4230276ed98f1e3668355. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN92134246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f62603c4022de6324cd5f60ffcb274d61c3af770544d137cef6cc03275b4d9a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:02:28Z), 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/QZHN92134247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde61a0fb2f0d535a9b60b015e39b06d7f204effde4eab5b0c35e666156f914c3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:29:28Z), 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/QZK6L2120568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0b33161914acff09c1c495d0cad601752d2255edebcbf59f0f3d079e562489. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6L2120570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b27956a8af8e54000161bd4f54e92cfb0ea976fa995e67a169baa13bdd1402. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6L2120571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a7c96dd4ba2f779b8aafbc3e201a10a0e1b36ce5ac1a91bdbbeb6765e07c08. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:34Z), 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/QZMEP2128887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef3660a8510cace547ba2453880d134cbfba3d50b57bb4e957dbbe1ca6f666. 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/QZMEP2128888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676aa65a3869a36ad725df22e677e9b8db5a82fcf55e1b4c38e30f0fffc0a740. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEP2128889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a81087c563c2903eff3d248cac4963f3b16af34daa5980fcc9439b8dabc7e6b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:11Z), 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/QZMEP2128890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02165a006879fb4df888011463055339b6e1c659a59711ecdcc30cf249e0d28e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2166061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16730d352ce1a32c3757dc43d38b8b7f1d793c498bbe4440ebef1c46f47c5cc9. 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/QZNWV2107051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18f58aa3cf7ea8065bc88a1d2cc901548e53d9462527aae55ae2a44c7d4eeb0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:30:43Z), 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/QZNWV2107053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf9a832569c0ae331f271601711db60530fcf94e3767b1616758e1ea1c56bed. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWV2107054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04479d0637d4561ded02affe829671f5e2987067b453bed78053cfb0364cc364. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA82282709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0504e8357c9cf205df43236fdc55dda13e79895093eb5348e636d65cd4f016. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN42273919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96033d36a5268e68465595372240a14287cc5feb96141f4f8b08bef99fe3b85. 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/QZHN72285617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa864d3cb5964c5c3a098acbc9eada499d03d83b34f339023d696339ad6338c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6Q2297268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4dc4be8147ec9caad26f46d94a78a2333be60e429513b0f89a5168ca5b5133. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6J2250407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c21cf24b94b15e3a2d225d507e2255e023168d2ed54e85d1fcdc91dee6c3b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEQ2232370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44f66d971a9d91808771a31390d57afefa12e0adb79596d40cc869d9d085fb8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWX2224596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf589d446ce5109a3c3cf83fc90a0f339a8a25a580bfa4287cdb369a0faf61db. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZPLS2266775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13438fd7d647d6a81c869b2cbc08ff65e041824476bf0bd8d14b9cbd7bf3ba4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB92244700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b8640996597166ad7c18f1e77912c6e95b6c467e1e938279226ef489b1ce8b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:43:03Z), 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/QZDA62310519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43fbd5eadb2b0cf8eef58dc308dcc76ede2dd488e8aefd89d0b0d1f0a0ed4b8. 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/QZHN32499883.