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 0xb4343cea4de1f67714fe3e9149b71e79f386c8b1f54dee29c380b062a09ad6a9. 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/65801c14-c554-43ac-bc6d-07ad78fa7bd1.json and https://artists.proofprofile.net/proofs/artist/65801c14-c554-43ac-bc6d-07ad78fa7bd1.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 0x5432ab5889a2deaeeea5a2e56c812d11bdf4a546b991ab20ecb1ce53c7772f4d. 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/QZK6Q2370942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd797dbc43e6b76921ef4313e7d3efb0c46661213c1dd6c14625f57be6752e128. 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/QZK6J2345352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23b1452accd49f2cd21997be892bf7ab7a47575d3689c8233b4e8660075a77b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6J2345353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd47868c793389ee846a2926c59e862907b73555c3490545a8468958f0ce8453. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZK6J2345355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07690d7f9cd091be936ab71df01d1239dfb44540f233234622ebf984e6a99d9. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZK6J2345357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e31469b3b807f6235aefe6bfbfb4f2ad0b14bef13cf66ead5d5aa62e61bd06f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB32348305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77c5ccc9d5e2d4978441d8b78d363108498fadb3e04accb997713e39406f8b5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFE2363736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fe2cdceeea9f373d9e3dc530108cf0fe245b3148af1fea8e20a6b2809790e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA82467347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c4433a6d4376eb99a3aa9a4dd3e8ef9f78c21a3165aaf365131d33b0c8f563. 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/QZDA82430394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743d9f336e7ba497d481d4e26a62ee1221f9dd5f29ed5766c785f73daa141bf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA82430398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ff1c0f24dd2388c30056dc4e4349bd86de9405f116fc51bd14bc7f2068910f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CA5KR2518974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94f4324c37b43b287a1e315bd8df96a8cbedd651fe62cf52ff0acdbe30735b. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CA5KR2527047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938983d5ddf4c4f75a3a2380df2ce02ec1a3eff6ebd0f49568a23153de8c9f7a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2541555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33027a222fd8ff1937d6199ac55b3073b3c4d32c74c2a79fa33405590dd6cca5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:16Z), 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/CA5KR2541556.