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 0x5c6f74cdbde0bf91b2d22b5a54ab9468f7e98d8266c31267464738a487bc0f42. 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/c0d135b2-9591-4e4d-b58c-022e7cb1759d.json and https://artists.proofprofile.net/proofs/artist/c0d135b2-9591-4e4d-b58c-022e7cb1759d.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 0x5e634bd77bb84bad0fa0a6ea5aec48dec5eff5d232c0ca2787119d2c26bc8cf7. 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/DECE72201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccc284e6d2ea59c5e097b80e84f2133734fac08154dd45a0d444e9e8f66fda6. 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/DECE72201744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3683aac2eb8ebd9b9315eb3c5c1929b6c831d778df3cb42938dddf0d73842b6c. 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/DECE72201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbae8968fc59a9dd07fd1416ad60b4ef1ae8958b904f507313c12ca5c53dd03. 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/DECE72201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6ad84d7da98ce3bcd330e3297ff7852640c361ef817993bff70104f942f3b4. 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/DECE72201807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa121f29a1e76ce4ea743cf4adf5832c9e41ced20d66cbd14f232a43b8b7a7a84. 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/DECE72201808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7a5ff15f447d1b7b8c84dffc9314f1871d29f68f0c39201fef732903501e2. 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/DECE72201809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd8fde8b8b1cdf357cd17a77b25abf0956ad048a6528c8f4bd2ca8e2901790c. 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/DECE72201810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854881b87782ef6c83dc86e6484fdde4dde9ca5b568c6358912b18f110cee59d. 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/CH7812105216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed019b1618219845432a3b5e8b258b6eb5e360ebdaa5ac5d18e61560498e66. 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/DECE72201811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac811bb9f9f6f4ecec3264bd5721f84971a50b8025328a452114fca08f7d01. 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/DECE72201812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a8c800852758ea7234f3e62d163d21343e28d8ae1e9070feb817cb207e261. 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/DECE72201813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f4d0066c7868051fedbe1e4d359412c353b588ba7c1bb816bb2975f68437bd. 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/DECE72201682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb07c42ac68234eeace044a2c7eb306b25b6d19eda7b163ab9204758368b6fe. 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/DECE72201814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf138b0a81194f4236f2a815f0057b7201ed83a561b2fc2c03c3374e579d6b39. 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/CH7812346538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2455fd9a75517adf66a3839f9e09bbcdd61f91476c05f9dcbc76c555561a249. 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/TCAFK2124392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bdfa37e0fa480ef9cb3714912f36372480a478dfb341fad59455ed2339d1b3. 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/DEQ121913001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a15c118a316555f8e3dd2078a18b3e323f74658458eed710f2556de0eebd6c. 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/DEQ022011636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf27c0a940d0db4187e40c93108114b11093b4e72822f4149937919c902a184. 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/DEYF12300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb3096f2339ca78e4c31dae7b19ea72ee7013ba45a7b8d64ca7b684449a7a5d. 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/DELJ81962919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374589297b3befc3b6850dd8f12c122f5cdde139030950e39f4d7f8f2a45a811. 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/DEQ022009932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfb5819a8ee0ea6d05740fa59ff3a0a836e67a5cbcfb975a2b3abd1f35c3563. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEA811801401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132bf4d5c15b311ad2178452fb71ab2c58befa0b40550bcdae63849b8bd8ebe3. 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/DEVY81700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb242d9aa53f6dea1d49eedf15161a5062368771dbbb82d64781fd03f3ed0a34f. 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/DEKF22001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8af0bdb3423e1affcb6a134fc9fc415edc923ea4f0f07715ab99772299b8ff. 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/DEW922101622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e63aafef7f56819073c8541a9493bd230624bccbd98539b118730a8763bdfe. 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/CH7812237763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be41410562c0ece4842f4512be5d197e1965b619e5be34b990edeb305426079. 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/DE1DZ2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5723a25a7f756f2ab045b60568074ce323aca01d2b0f01a138cf5051567ec4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM7281813995.
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 0xade5907052865cdfd7b058a11f5c20d621e02af1693ab590ab4eeeb0a5902284. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA052270429.