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 0x35bfa19b16df5dd57badaca592689f66be1501e4251376ab6ce0cac27e9f8f38. 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/cb9d1793-538e-4c16-83bd-6f56a84f32a0.json and https://artists.proofprofile.net/proofs/artist/cb9d1793-538e-4c16-83bd-6f56a84f32a0.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 0x4c04e2980e06be8cd9fa9074ab4a872ba376952af046d292eb746d4818af2b70. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR96X1858254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb879286a5e3c676e4222991ed967387adc26e3affa3e997b8276e0fd023ef1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:07Z), 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/FR10S1956478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8ceefe4e1b5635d34360004a840b7f21cdbccb39c1f82bb9fb0e24d3117b33. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CH7812228492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f69d8a606d91f3d21928c332072fccbd67d834a7021058b8f4646533ed7ee8. 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/CH7812228497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d8c32f7e163d51586e17a0df3e18ac6d1b2e48110252b3d74f74656ce6e5cf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CH7812228498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29705b2bf41d3ace1876e7b198271e284c6a5e94501c6f83bbb052201ef83946. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNA2431514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445c414df8fc14cdec3a30037402290728606df387370a53bec52ca6e6ec75c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2431515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3751576b340b4f070d0b32b2e7f3951c126c6032c0dc71ccbaade04be93f3a16. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2438492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658acde00caaf982e81357f21b0702090aa8ce3226527b8d9362d949077ad297. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2431517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b47c4dc3816977824f72911d0fecb2b3b8447e9312251931510fb225e918b6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2431518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b1fa875565a46ea1b986c7189850d88a10f1edd3030e1559404c513f215384. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHNA2431520.
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 0x0f0eb5085de1df8f7da52c40005d82c8822c059022ab52efe5c157c74772b37e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHNA2431513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9808cecad59a8fab5beecd9dd14d614877b124046b3b84fcd9ce0e414fae8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZHNA2431519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8bc7eab13c176ea6c850fed1884c27fcb04cc41c2c8077190800b2ee81d7f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHNA2431521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbb8a81a3f2a9f0f135266ab7adb3ddb3c160d16a9808f4d98c90884cf00320. 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/QZTAT2531239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a2c96e81961adeb482d82001305aae3a3e006b8ba1dad51692085bcc953f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPV31320011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e409b6d266516b3e0de092f84d2011f0915b308a58d6f448471f5456494f0ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEVY82400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb331af45c7b51c559017ebe76e045c9cd3ccf7d7279630476d682b87724c57cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX871573175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127cc2fee7491b1ce77a97759c3c1297a1e7597b0e038be2970a8e867d5b16ea. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEZ470600369.