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 0x11944d7f8f322acc8d556df4435e92843a79fb6fd6ec6c5a4c18f6a90b445b90. 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/664cbb7e-e924-4d11-a7ed-72ee50372106.json and https://artists.proofprofile.net/proofs/artist/664cbb7e-e924-4d11-a7ed-72ee50372106.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 0x2c864d4bc417cfa83e80e066e60a18e0bae87af86e3d361ae1888153b1a14dc1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ITB841800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03227bd0bdb468d134fb2dd666d86f7d15c5e7f92e6cde10f3e66b0b1093f677. 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/ITB842000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550b6dabca016e6bf5fb12b3f95224d13b224bc8d887a0b282754a023f8b38e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITB842000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e94c38fdbf1d185be8b1dc17e9538e3f3613dd8a93ed618ecce63c8a44c97. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ITB842000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff07da0f331db40d1a28bbfdd29f616e4d39b8807c2937e94e57fd9b1fb0f42. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:13Z), 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/DEH742042667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682c38fe16bddd035edb8d49314e92788d76a9e45bedad2b363ede48b84a1fa6. 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/ITB842000839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e2f91fa45db8b5ba498049fe3c283614febce6ff34e90abc50f992b658a63. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITB842000842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b53779fc5049b1f908f87b9535f701572846b707bb25f5036f93f7ba289d8b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DGA072182200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf634673bf38c454f7fe4c1c4f4f0f66055665228bde942b6a49108d24749eeb. 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/ITB842100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bcbda670c8a9e0044a3a4b5b7c5e197843044045128701fb133faae78df644. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2188035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753763e2c5f32e36d17113ae63f3a4117f362d0b480307b0c7a3d3526427425e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:02Z), 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/ITB842300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36deeb30948731fe2179992c4dff8899d7193f9d2b59b1b8f8518b8c154be6cd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ITB842300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24b7873895692cfda458213990f202c4bea01560a50e89dab1d86402b7fbb2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEPI82313681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c667af654a2ea4ceeb936f1630cae7436e97aa90f035bb53d178a248e94a48. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2378069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511c7d7021885825063c8b225b8539bc255eaaeb77084603045f9e675829de17. 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/ITB842300494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5032bb5a0a7ff46fc08eec664d85a27c724ba9fca39d14ce9f222aad6a1d3272. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:36Z), 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/ITZCM2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52111710550bf78a8ba6907bdc6389075249874c61afa40b943ce62d3d6e14f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITZCM2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24918ab2d88ac51719822e088898677e8744cb5fff6048f723d6313bb5282557. 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/ITB841800598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e2a60ba4815a6cea90a77a87d1878322c04a8743785727d68023d76cb54cb5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITB842200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10ad7694ad647f3b60356c8b64ed7091af8b9ac66ee69ba2538f5b8c67e5129. 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/ITB842100318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3153f71c26b5b52b5509c6591fbfcf6d275eaf595fe775de56fde2bc1371d54. 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/ITB841900354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe70fd3219f04bd94646159d2df1e8883515e536c61f2fd500fc6e1227f688d. 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/NLF712106447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57493b26046eec9f8525287e1cc7bc56c3b51b4ac2fb37897d3ce9a72690f53. 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/ITB842000405.
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 0x01f62d37ee535a4568dd672fda925b1e0d886085e5535c8c563cb8ddd8938791. 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/ITB842000194.