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 0x3fb72974b2604ed5400f3a9023be6184808eb59bc19481282e1834856a28bfcf. 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/ed94cc3f-a61c-4f26-bdf6-941b1888291e.json and https://artists.proofprofile.net/proofs/artist/ed94cc3f-a61c-4f26-bdf6-941b1888291e.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 0x13c92d3a797385a00c37991b04c59ca6b4f8171a7684dbbd5dff332fe6ed20fb. 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/QM6MZ2277610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb278aacdced680e7ef94060c472bcb308688c358b1d88e78fabf6e5e92a17238. 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/QM6MZ2277611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9834a221f53f6928455fca84a791d6cfaa08bdf431be06a7bd3330182f693b. 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/QM6MZ2277612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd60ad1826f83c37a2725843a953daf40a146c7f524c6166602a11c4c8969f76. 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/QM6MZ2277613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c45d946dc490675c7aabff09ba241397a20af5204b4c6c876eed965f46a105. 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/QM6MZ2277614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb760fb7381f7f37e773a5a2e3b4ec23d8bac3511ac8f549f2fbbc6d920daf. 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/QM6MZ2210162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be03941bea3c456b9c7c493a5f2d8cbd773ad982c11af32383027f9037708d3. 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/QM6MZ2210157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ed1a49ca4e3dbd17d181a2d68690913c0e5864d891a0149ed77ee0e68da15. 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/QM6MZ2210143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9481dbb9d9528cf8ed1ca0542907a67144e1bd7ac2528985b21da91bed520b20. 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/QM6MZ2210128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141cd0e6702e38d68cd7fa24c511da42da0fa5e791873babd5e8cd240db89554. 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/QM6MZ2210108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a868c2fbc398ace68287a1f9d4404bf4a8f3efa77cb6aa12167cdfcc2c817. 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/QM4TX2253624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e165afa21a599d2133d83c9447683e48437c0a5f6c32cd772c426e5d78c2f3. 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/QM4TX2253613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f634dc74f35e925e76f0447f96b88bf432b1ecaab5a0562fd2d1a70e14840c4. 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/QM4TX2253602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7c980444781c75af4b7df3a058a815704843de18822dbbfa8a8f52042176c. 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/QM4TX2253595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53955acdadace3fb2dc4a451015d86a5e53ccd048a4a6224674a287681f25f1. 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/QM4TX2253561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e994ff287d98029fa71f00b8ce34c75ccb842766e623231e99d2ffce5ebb69. 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/QM4TX2218844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82447125b1d27f5629c9e625e0dde13283620256c86a16fb2a433c0c16e007ce. 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/QMFMF2117044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d3827f91cc36092a20dd8738e0f24be53a9b36e729925d79f2760312d3be8e. 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/QM4TX2231562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281aed63d2a9380f9a25feb0d5d73a5d006c92540191c579f35f3ca86e6e58d. 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/QM4TX2231587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e994ff287d98029fa71f00b8ce34c75ccb842766e623231e99d2ffce5ebb69. 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/QM4TX2218844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89af8a0cbf4e62293ef0a6adc4411530249f0a665b86662899514a8da876c3. 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/QM4TX2231590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25815a98685a0cb9162fbeca361bd8c655e48410a74c17eb2faeadec9ef227b2. 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/QM4TW2245465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca0dafa521dda163f6f6ef36b9398ed129791aa0fe53b42b4bc1e47b3cc4ad. 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/QM4TX2231611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37013726926b381dc69ac90f3ba2db67f68d5d8b92da09696e878ad48a45af92. 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/QM4TX2231516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856fa9a044858e0f45d90914604377d4456263b8432f0203be8502e6060ad988. 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/QM4TX2231592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d84f76cc7ff2030218bf89437e932e6c885daefe15bbcbdf53e0f753c93d078. 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/QM4TX2231591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf654ffd6368f0d25e246b2f90bc540f5b3dbdd49652fdb04d18cc54aab90b6d1. 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/QM4TW2255130.