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 0x9e82edf2d5220e7d1676f7b7a9e4b8d28d3248d65bfcd617a290b831fb4f7acb. 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/708d6097-494a-458e-af94-95834dde3540.json and https://artists.proofprofile.net/proofs/artist/708d6097-494a-458e-af94-95834dde3540.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe18fbee96ade94b510cc8165d7bcceff87865f8885988769ecdb9070bb194432. 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/MXF399200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70b99d2492e6269c2ac588be52abb5dba61465b089ea0a13f2bb124b8dbf2d. 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/MXF399200844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e733f77fee377abaa3a5c50309e51b6917dc46d0ebebcee84efa31ea3019e92. 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/MXF399200847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6923b0b55e7b934c656a1aecfb29bc3a84f75c666ec217520cfe82ffb7402f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF399200851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d725f5e29cb383686c6a02b8537cb9037de0805c28ff0d19c0a693a70e97979. 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/MXF399200849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29c29734546f86b4af7d38e23d507264c682875d38eaa17dee2d8f068b969d1. 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/USE830964867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed8cb01782564c50c53f2bc88ecff0cbecdb01217122893679709e2202c854. 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/USE830976871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e49575f62d5a112f576bff9c153d3e17c0c2138e24bbcf6827d8fa2087f3e67. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USE831538611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c7a079a12f9fd3160a1cd8c48505a41cd02f13cfe4d1edee5154b0710db69. 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/USE831538624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4506edf4983da9d2982b5d3cec57efbb3e70a9090a499214fc8ad2638144e2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USE831538628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a92e465309673166f6f86ac790838a084dda7645410b772d07a516e6b41ae3e. 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/USE831549153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f49f4ffe5b8ab43e908a20ec3632d22a0a8dc4331565c8efbd092f70fdc474. 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/USE831549156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bf69564ef36807bd3af36605db7341759aa444a9c1a6f6e8bb7bf7250e0985. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USE831549461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299dd4310956507929bba851c166892cae49b8208329db9fcfc873375ac93b0. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:44:10Z), 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/USE831549473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8edd38caf648af3665e733f38f67f44d48675b311d2f88ebbba3e77213e7b6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:37Z), 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/USE831549463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3386c8b5b25ac667adca4869b14f667a632222554e4a5f84184625ae24c9d303. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USE831549464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de71768503f7c766100bb49d08321b3f45a6730687447968b2ee42c339156ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USE831549476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a01df0ffbd60ca0b95674cef568c404f2f520beb72433858fd42bf0ba202425. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USE831551616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634207356776847225899f275e877fb166fad1f0645cbbcb3f7663d0f38f6862. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USE831551605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d418d1df21c1092cd2ade0ece2fa8a2d88e499ae5114fcdcd20b84020acea. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:03Z), 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/USE831551611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0c506d2ee932945d5c6cc35bab0297825e420c731ee9dcc08499a5acb0a0b9. 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/USE831551617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ac39c50a15d11c849332a6e8f89e96c955a687f8b61791b4600caa0deada0. 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/USE831551615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f48bde60a538ba479530156adc99d236eb1412b6daf4ae4d1dbc4bfc309442. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:37Z), 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/USE831567373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4326fb7586b2ef078d73fb52da849880b85d4f3ad003747a76fe4a809dc514c5. 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/USE831567377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c46a86401fa58912976e474313414b385eb8967d74295d6fb5b8e9f9508ac12. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USE831573488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f98501b1afd1fa74844f542fbed6cecc47c798cd1572b6f66ed5b25760e63a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USE831573491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e382e5f279140145dff120639f161bd995ec6797bd2ce684506bf83982cbde4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USE831573493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342cf9d5b414a93f944d8605341ff582f4b438d36ca8d81b602bd81d5052ec62. 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/USE831573495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb379e5f7741efec770339ae30f57920937e4562273f3c96b0ef0cdc85b557138. 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/USE831574029.