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 0xeb97e59060fb1ffce4bea07695041d01995d433540da457f2dbf381396e4dec0. 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/69a0a6aa-a103-49bd-82f9-369223bd103e.json and https://artists.proofprofile.net/proofs/artist/69a0a6aa-a103-49bd-82f9-369223bd103e.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 0x0b20c49bd4423951b8e5df6675f36dc192525798ac3e7b00669a5bff39477285. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INN242208628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9576c1975088fb0751d37a66eb7211d760311978ba01f28b30a0fb32eff2267f. 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/INN242208632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f0d960663dc757e6a74a9a2c07b223d19bd2c821a22ca8c20227d083f0b836. 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/INN242208634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c92b999272a7a6bf3b7fc200ddbd340ad081a83c19ead3f29cf59c864a55cd2. 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/INN242208639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c83ea206b9d6294026f22523aca9fd23739fe8a7a7e29b3c98638bc3b27792. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/INN242208630.
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 0x876f89be8632c4e5d6031ca27ad2de099b58035120f2e14aee3ef366905a32f9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/INN242208633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92997f9aa26212a80ba4692f2b762d911c47501f68e1d4af6758b509a4b104e4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/INN242208635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093df50d60e588aadd0d41b95c23894ed03365c8a759f0d2a1eeb4ce6c3543b9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/INN242208638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e6c2ba7e7f521d9784716ab793bc5b9ab11368d587fa37be5e9e86bd7a0cdf. 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/INN242208407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02228e1655e9b2a8a4f6340b7e91037b68c584449b171974dcb975dbf211689f. 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/INN242208409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a020a265eeccd9307841f9398a10bd941f8d50e9b61259dade9b24aa3f97eaa. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/INN242208414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a1ac5af0836f1c38e473f98640ca8b7a5238a36274a784769f3f73c51d8f4. 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/INN242208416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c508a732c91c24edee40dc14584060c0e40bb47ccac573e07dc1034f1cfcbd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/INN242208410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69b4ea8ecf09e00e9dfad6f2ab6b73097690e0fef46c02e0edf2a23e6ab1ac3. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/INN242208412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5e34ca069c217df72bd6f27d67aafaec459793fcd38dc9531557894c7c5f78. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/INN242208413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6fe1ea5400a6106e8fe970a4dc32d267e03368f476324d0b5844c3c14036d5. 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/INN242208415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e29d35fe55b6446a65b6732a4e83111245936460236f5ce043bc81f6545773. 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/INS5V0700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae93f2f2ba1bdfdc544a009c19186e45be9144b12f47631d8ba4815f6e5471. 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/INS5V0700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f211b42760698361ea0241a71d584043be090352c5638626803515fe953bb22. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/INS5V0700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaefc00b23ee0bd2d59f0d11d91d516b49720ae9fc1357d9df570e879c3230b6. 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/INN241801788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67373d76b708274c06c21f66dd2c1902040a4d3b785f56f58c960030aa62487. 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/INS5V0900377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c471a7024412498d03b3912e9eeb6ae4dd5ddbbef938dfa98a4f768b44379c. 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/INSK72300045.