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 0xc9b2cf9e57ae1339b652bd11e664f06acf6526acdfa3b67334bebcd514414e12. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22ee33ce-689b-4785-b3ae-ea1762b450f5.json and https://artists.proofprofile.net/proofs/artist/22ee33ce-689b-4785-b3ae-ea1762b450f5.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 0xee85e7ca7352cdd83c87d8d2b3835900d11597f2cbe516bc15dedcee96da1531. 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/QZWDE2467945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fcbd1dc5d9873a2cc43d72e258029fa4380158fe0096bb5f9f0bfecf16fb0d. 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/QZWDE2468192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a0b73e9bea4ec707947da751ea2618609fc933bfd574481b7fe1e6ecb47995. 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/QZWDE2468424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb1b91afe930ff2b135686e2983105f5a65d082f521778ac97a6d3229693c23. 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/QZWDE2469456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61aef93aa1f063a5a98585cf9b8624aee311e74e0c743bf2b928ff2209a159f. 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/QZWDE2469536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2abb0e64cf141d82788aceb12181a85a118a71339054a92701532e4ff9a147f. 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/QZWDE2469637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd14fc6ccbe11dba8f02d2075deca0e63415ab54636305d007351a70f373e6a. 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/QZWDE2493517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa81bd22f3abfe39b3443bbde113622b16279ce38c33554657c0699ff5f616b4. 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/QZWDE2493529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d2f6fb086a9b2209403c671ed17bc4f8a3dbbf2608aafe2659c26971a4f8a5. 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/QZWDE2493554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042006501d9938882d1ffa53bcaddb1def2502bed3694d8a3d5547b49450f601. 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/QZWDE2493599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddaf913498ec1a3f7664e3f9a777a461c48bba830ea0ca2efe2a9469f6b7cab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWDE2493624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffd76775f958dbf53e7474fd95b0386486d31e4c7a35867bcd7d721a53854a4. 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/QZFZ22208847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf2181941085ccb058775772f0b35c2311222c2fdf84e127ce110d9c4536a1f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22208848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6669090681b5477e1949a02b2f19bab37c6d73a1df791d0777de7fc7bad883af. 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/QZFZ22208849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2377fdc59309f96a8c207ca01132389d7cafa8bb9027d868624e108789a8eda2. 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/QZFZ22208850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8018041a76cdcdc0c80ea53b29cc59385261ef0df41f4c5f5154d01108e92c06. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZFZ22208851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3430aa7042ced03361eb5e92a4f352fce1e2fff7d0ed4d30338b5268612f8f86. 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/QZFZ22208852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc1ac380c803d01a010e8a7c5ee01b116251b71f33d880c53630743081e4b7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZFZ22208853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecabe1df8c0e66bec779da7096e1e363c4334c7a93821e18a3ab018da60b366. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFZ22208854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc853a5010dd9ba50bb26c1b2fbae44525efa3a9b1947f8bbf0b6b44b232dc72e. 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/QZFZ22208855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83841634ea69258e39285b83c1b32c9c9d80fb26f5d541d667229a7e3b3e6190. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ22208856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ba9440f57b9353a247f482af8895547942e1e35b2656f64ab19bd5c0e326cf. 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/QZWV32412897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d193976660048ac2e68fbc05e11537fcb549082934cb6dc8aabfe8ee34fa522. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWDE2432115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859c3030a71be7cc8b40b18dd86f65ea287749d66075ef19ddc2ae718acede3c. 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/QZTAU2148465.