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 0x4145fc67387a556b7aba9b45695ea769fb2147deae71d425706816d8864b208f. 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/38b6f89f-10f3-4252-8cea-e9257ff9a0aa.json and https://artists.proofprofile.net/proofs/artist/38b6f89f-10f3-4252-8cea-e9257ff9a0aa.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 0x8c95420a004b82009059004288cb2f41ebf59b2c2544d99bcb71e16bdddaa0ff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBC2435583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3cd0c14fe354bf3c1a4ff02524316fa14d9243952177ef85ee592d448276e9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:42Z), 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/QZTBC2435585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d965f74ae1ac49d5738405b6c9a2fa2744dd125b511f653dbcbc7eaaf7c53a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBC2435586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf8ecfcde360c270716a36b80458947c2ef4506584155232a1b729dde59ada4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:43Z), 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/QZTBC2435587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5743c031c076d7b4061f75157e7e40a1b300039540219785be77d965058fdd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:01:24Z), 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/QZTBC2435588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f73cdf0c3536bf27d7d6d779426c425fa4ebc1b9efe306a28795c26438e3fec. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTBC2435590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730cfb606cac8e1339a46cc5fb59529c52b2c39a6ae024d65a7c90170ac7b4c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBC2435591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97920261e9a2aa9554faa806ea076fa5a09fe4cc608e0e426ad69349db23c5f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBC2435596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebb6ca807f2193b44ed3fc39fd70d49294d266a2e39498904fcd6b11bb233dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB62401122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9892d29a09cd8f3871f8c4d7af68469676ba4ccfaf355e5834fbc99da1b09560. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB62401123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e59af69b64065964926454e25be3cbed20da541f45e8386203568e2249bcba. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:24:18Z), 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/UKCVA1701073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd4926eccd8d6735f8a224a425b418752cfd6abf364161c741e298504583cf. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:04:03Z), 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/UKCVA1701079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19716d67d84538f86a8888239688c9b2ae975b6f606438196880c36905fb0245. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:46:43Z), 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/JMA271909626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9924e46676d54896a99c68e11f8db8a5c7ae0517bbccb11cbdfc335681a5b3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZRP42455839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82897caefa2bfb00393ad67613dd08050d97ce91f4808cf360126800385487. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZRP42455840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40c991be11304d47f2a2c397bf73795706717da9576b8af2431c6ab827f647. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:56Z), 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/QZRP42455841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629ad7ce97d70dbf35e675dbf92d9d058590bdfa19a8d8d49ceee4c579b33cf7. 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/QZHNC2565817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6197a64e6e0bb6ceeffb4d4e378dc5ec851d5b4c06acbc14eaf924fe420b4800. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:58:09Z), 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/QZHNC2565818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1178a32e3860bb7f7680e1db07103031bf980c31f04178c2655e2b33c2b313d. 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/QZHNC2565819.