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 0xb1adeecefce10941525c66a50d0833262b2391c51aa1828976fa3ef56477821f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0a9bb73-86e9-49cf-b5f2-ac2fdbaa8054.json and https://artists.proofprofile.net/proofs/artist/f0a9bb73-86e9-49cf-b5f2-ac2fdbaa8054.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 0x0862cecf5d984a6c95a0fc01e7812188b873288809a1843593ab120927c71f21. 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/QZGLM2000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bfcebd938d7311c44608c3c3c8e6e26684076f43229a062d71672137301c3. 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/QZGLM2000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd7bd4ebb7941f59f6ccc3af2dfa5da1a8ac1153923775e17a30adc1132789. 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/QZGLM2000324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb9441d08d8dba398eada2f99a24f39e7e3229ad2bde1180d252baa0d21e99f. 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/QZGLM2000325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c06c8b743bf3b840b618eb7f0e1baaf51b701e584c35d12e27d7bf328b6646. 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/QZGLM2000326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc57c1e3aee6acc740196c6f4c4d80e57f952ea516786d9cb45713d17c591c1. 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/QZGLM2000328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4840116cdac985dc362aa783bc3b40736a4b26be0b5ac5f3c13fec70b2fb2dd4. 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/QZGLM2000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa843c15d7dcc6a12336dd8df2703eb7905d562a51f4f4264e1a7fd548f3f6502. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZGLM2000327.
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 0x7520afde6f0933bb9e370fb48c2a399c61109b6e25c3465f9d6874ded7dcf799. 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/QZNJW2470706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef0f61943cc05acced02d21675baf6b92033d725cc037e6654f7a4f22df703. 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/QZNJW2470707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa076ccb191440f6eb81be9c06f75693e8241fceecfaa8572b4739fbd0eeb5ff1. 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/QZNJW2470708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac492b18c59435676bf7a3f993ef15d05a1caf68e5fee2c7f2233eb54ff3dda5. 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/QZNJW2470709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27801a1260737b6debf1b23234bb8113bb1dc8c30e5466f8c1f2847f503ddec7. 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/QZNJV2476388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa74db45370026bb865e5e22b349389e34acbf1c7f8746e0f0c408d88edf2e8. 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/QZMZ92413558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89907ff48407a6bb3aebfbc2592512751216782b9791ed28cc65b1619bab5396. 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/QZMZ92414524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd6ee8032189898db5879a1c884a8b9a554e2b45ac976ed6d1e08632aa31b9a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2494395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069d6b522ac4c7b00e7d1f446f42a46c1cf11df094948eb217493645076958cc. 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/QZ5AB2494385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7540ec520c1296551e97fb76ab0c46d7f56bdfc8fbdd396cf2c2bb2fe28c6a. 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/QZ5AB2406658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b6aeb9b90315b967b00e6cb636b4aa0a9e5ec4f751f3903dee9851acce8fdc. 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/US7VG2416884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c65eaa89f461194ef9c097d5fc482d658b3263cb9a584ff5bdb760ad026a43f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2399616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81848aa56d475e512ec49d1dff1e224d06af555db766317106d2fd9c6f7f219. 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/QZW9K2325254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034e6e6cbb3bf82cf8f2a6980eb56f3d0f4b6b41ecb9f1f11cce404f8645daad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2306644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc4740b3e85e30404571270886727a9c16c3a20bb2523a2eb3ce9293368970. 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/QZTPX2302565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abbb91f052a2302a457175a1937a6d10ce19b24389170364dc385abcc89f42e. 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/QZNJY2376344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9ac1fc0849012961785e64f21c03235f6eff802850e9bc5ba0bab382c48ce8. 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/QZNJX2398658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62490f90e81e205d28ca080ecd3b2aafe4b5f86446abd15fec57cc4bbe83feb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2355126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df4b8371ab0008c2a907e91d03664acaf42b7ae2888ca186bffc561e64f55c1. 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/QZNJV2395574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ce813535cb671ed5f45c7ecd583e0dab1c1a3d0f19c9994826b0945f6f941. 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/QZMZ92328489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3ce0b3fae6faaa16dddf5a5e595c73e80b8b3dca1bcade73592e76eb71c21. 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/QZGLS2365059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc19fb8669cfa2c603265c53cac3ae5ee2a4f708001b91f2c7eb0b44ff6b8ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2368937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dddd80beae1bc0342c065ab19810fc3464e193c585d390c32f4c2405046aad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9N2246314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd11120bba316e041251081f6affff8f1103d9997a0b90fe55056c9c1dc49a3f. 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/QZ5AB2109665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce83d28eb1d90c562519381edcb5422829d6662923a8cb00081b32e4799ee96b. 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/QZMZ92078983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6138dc77867cf6d9afb5efdcbef735a6ace8a7a03d2e985e77d5d54e9ba82c. 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/QZMZ92048519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59723b81620b8f99256d86aee4469f4e0476353097a49f965cf2c655e3a1b0c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHZ52045568.