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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ecdbbd67c9ab1cb6c806f2227e3f78073c76f95040c3b3db610bcfeca185c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d4f237f-9bd8-467a-8616-7d8b88578786.json and https://artists.proofprofile.net/proofs/artist/4d4f237f-9bd8-467a-8616-7d8b88578786.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb0cbed29fbf61935a2898adbc897086e6f14cfc4ecf96bcb56cb754ae93617. 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/BK4DA2436706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b2a82c50c5e88cd2f11001e3197134a4b31c0db11712c10ac07a119a5d55a1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BK4DA2436694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6372e0750de05eb32ee981e0ce2615857de2aae8fca13311fc504bcdf89653b3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BK4DA2436713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b6c98ae71f858be88024fab255f025f6f0cbfda98551945e304048de652f26. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BK4DA2436714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cd851d6e0d3b9fb3491a840d17371fdc707c93240cb5ed0c5bef9fbeb572ca. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK4DA2436711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d7975ad2f3c1aa95bf29c48284e634bc3d5e001a3445c6babafe1bb8d499c. 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/BK4DA2436699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e34c051cff60e63fb471e53cfed259a04a7a3da8bd9ed5ebbe81253f98b94e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BK4DA2436703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e2c6b363ca19b18db2299f2dc2164e23d2a794eaf159c78aef9dc804a50590. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BK4DA2436724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b00e0f36211ed7506f34b7e09b33d22724ea10760ac28d7460016adfcbb6df. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/BK4DA2436721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ba23d1fa96c73cf3b70f1ffdeb5c53620e2d5dd4f145ad7e8417536a7954f9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BK4DA2436701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08878f26dd31a4eb06533f0884d6d23b6a28af86aaa2d89ba0af96badec2695. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BK4DA2436702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49941e01cf03804bd1b021e0223a01f8149306e33a1191dcb87410581a0560. 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/BK4DA2436720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccc0a2fa60298e2b51e439326b6614f1c3cb4e1226c8977c374ee7a250c3cab. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BK4DA2436696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3b9f93daaa8311c991e6279378d97c781fc7f017872ddfc3634c36103e4714. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BK4DA2436705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a34b56bfa78a957c05095a0f2b76f483945a56f28f84e0faa9fb140b7e5c1b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BK4DA2436717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf452e2abcfb45fbabf304a8267b5b6d05e0e770e27dcfedb9cc8fb279e291. 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/BK4DA2436718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55ed050a82d66300c1cb02c4334724977eeb4e29044a0f056480fb0b979530. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BK4DA2436710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288bb754a386b33e92eb9fa23c2a5ccb32a9662bc86bd7dd41f288ff81c8a686. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BK4DA2436725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee9ee434cc06f5dc8916324c034dba9b2ccfc7b7f45d563219fb97aa99f42bb. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BK4DA2436687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5907a6e5d67cfc574a8317f3e2582b4027985eec9e4bcb4679070c3dfa822574. 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/BK4DA2436690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428176eeca1bd196d0e7eb8b0d0518a40bcf5183940f85bec86cd7e80ffa8ba. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK4DA2436698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf776289313d7a4ddfdaec96c8c7d24fec23e3717b8be113675f121e389556801. 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/BK4DA2436704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed26c7baa01cde17aa8a7530d3fda2790af2af228a4555d11e190dd7fba4461. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/BK4DA2436688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0451464cc156c5a11e74afae232acf38afcd188713d413e1c7b8ea3e5885ff84. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BK4DA2436715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b8903aa0b4d0fc4461c6c95af8c056f106faceeda42064aa7da938c9c08168. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BK4DA2436693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a371ccf08ff7b0542f9b01bfedace3dbdad44cca4d25af7543d47c155f1b4ea. 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/BK4DA2436689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc427954619b454b8565ebd3ff2a0aef38cdc322c208d3303b5cfcd2cd654672f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK4DA2436716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f33dec821d2dc68a5380ec9b9a30457609594a915297a11be39e6f4a1d101e. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BK4DA2436726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a049e59df43ed8c3d55b034fba27b36e995033a8459258b8ecc9fd9f173c383. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BK4DA2427270.