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 0xdfca498584ae60a5b6d1d0fef2090b6512da94eeec3febd593ba4a3bcf585077. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e35a6e36-9316-44a4-a39a-958f97cbab22.json and https://artists.proofprofile.net/proofs/artist/e35a6e36-9316-44a4-a39a-958f97cbab22.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 0x70a542b9bc44104aa8e3b4563af29a830de5c796c095520f2bf27806f3a36363. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB22566494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5646dd12fd981d0b541de87886937607ffd421132471e45d9ee9fbb7d440b45. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ7N2491304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3d321e7ca97b5101d3bc320e1186ca2d2e25bec7f6a0e34b7de8e23f7f659c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ7R2426395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde4e285d27a272b8990bf6bc1dcf7d7cd4de512fb4e807acff981703a42d8e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEH742436897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b0f8ee3ec02e2a3840e770a7589991be332b8e2a2a6c4fda2d96e45555d05c. 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/DEH742436898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5449e318b2b8af640243d0a99ac8c36e980157ad6317f1cf49f968917d673d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEH742436895.
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 0x7496bbfd0cb7850d01f3fc5f286edd0b1ad2ea05436b37505c425309d3dc2e1d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEH742436896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265ae1a2a2e6e59bcd7186611b10d9c44e370219b29b5efd24072b4a3a8d0df2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ772402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697d5e7a5e8c5d0f73d8da539792adbd058d7f1b46f4c2c332973475aab2bc3d. 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/QZHN72461485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d205ba86660f04f89d9199f88e0be2e0b1327f65c465c9a2363dd88de4888. 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/QZTAY2308372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf41b86bf22c5e607574ce4e9c5bec0a90fca03a42bd3a962b14ee2f4124e5e2. 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/QZMEQ2393877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706bec8a66390be740cb46511041f8ac7a5b0a7c444857799d0b667cec63d0b9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEQ2393879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1cc50be382fd1084b39006f94a82590adc2e03b30393d1ed8668c8dd34c9d2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB72272982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb8ab30f39591fbb4b5c27313562a5139e34bc2a721f391b53953c7609ea20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB22236356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db4d050493453bc7466d09367d7848318d88340c7cd2f1abbf3b25dd702820. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEH742212399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da422dab7987d5f4ee7be16c1f46ef3ed0edc70b914badc62cdbd94a4ff577e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742181495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d10a6482fdc98eb44ae4c4404cb6017fd6db4d844790ec61d01810799fd5f. 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/DEH742175557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1104058ddc762b20c7a9aa3067cabbb66d4489d83ddbb1046bc4f311b5c9a28d. 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/DEH742169712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59682a49d0df9967d70a5fe013348d60260dd769cffb05b9f80df7e106d0e38. 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/DEH742173453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cf549909156b6dc0c29280e94016c6d5af5d3f6015651b9cc2314247ceabb4. 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/DEH742171926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c4d79b5f679de5c63ca1904ace3dbac1fa9ef7cf88ebf1465943dace29282f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH742168117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94019d57b6a8c1581a37be9d3fadf2e72ada3319589fc91abf618cff3eacb724. 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/DEH742164304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bc62ef034f7a41f774e022f414d5d81e63c6513c84c81132e0ef844b33525e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH742164305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42778730163c8d96201420fa6d019f800fcf0a00604acc73342d3a3bc9699472. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2364848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55253509d17b5070446d6a99aea44c482db1e3d2fa4e2881aa89183ae07daed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6F2364849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec036b67cbe7d8ff0021c5e914ec6b2de206ea8673525c540a3ee5f3030355d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2364850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06d85afd331a243dd72fdc9115bc4e8874f244342bf3e7f5e67947316763dc. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QZK6F2364851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbce2d9aed0329b0faf884e7ccc3708a03b2b8fbdf1d4b66f592138f0c7a798e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2274194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ea90e149fe48608e0298858e26cc1a33e266f85d47587fb0284b48ca8850a8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2274195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a4c87d15766e4ae1c8d31fb5e4dd488e07cf1eaf586c0f8bc62bc2521090bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWQ2274196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e57b1ac3f3d241abae858e12c999d58322477f49f8f52410022e9f37a328a6d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2274197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586e4d7ad7c37ec228d0d9bcbaffc145fe9f349c9cfcbc52ee17200b7cbc3d79. 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/QZNWQ2274198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869138b968d3e957f03aa286fc17837a3f8fd657ab887a9d69ee825227818ece. 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/QZNWY2375364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cbe38cc03f9bf247c2df5a2fd0a6a625075a2917f40b3e452f0db794531f5. 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/DEH742101312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfa9aa7a68983caa14ef82536d32562bdddccebb29d5b1892bb48bc2802dec. 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/DEH742178761.