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 0x3cad83d2bf989cdf824f88f54fddbfefc1e26115c629b85e6f2a07a1af34409d. 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/a3cde1c2-c90f-4097-a6ea-74fc002e18c6.json and https://artists.proofprofile.net/proofs/artist/a3cde1c2-c90f-4097-a6ea-74fc002e18c6.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 0x6261e3dc429362bd777f110b66d3fc96932d3585bd3d9bd99ddaf448526b9ef7. 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/QMFME1934480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951983f6b78b172d163bab00dcf67cb0d42087e8466fef83aff01ca3363a8355. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QM4TW2029758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4821ca658d4af40374f568c3ddfe391e8aa3373eaf02c79596f810dede8003c2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX2026099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ece301ae607f065f6f4835cb848f480fcdbdf2379320707dcb48540ef694ac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6N22099653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417614a4ab87fc65967b2c59afde0964cd457cdfd5f344a0ef6478180b9bf513. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6N22099654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78a7b2cf624b233419427180a9acb327bbf5bec37b7c247c6eb19c3def4ad18. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:31Z), 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/QM6N22099656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922daa2df9769d2baa524266a6d76c869f32d3c635eaa20d77fbb302ead695b9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QM4TW2116729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6254a2aa975a8830594156f32414892972838baa354861baa110d8bafa2e27cc. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QM4TW2127247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5eefe86e6ddba821e9cf04a69902c3e70bb33f0ae8b211d1df0ae35bcdc00. 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/QM4TW2127248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b0b07c292659eee77511006a4043cd42f5a4c6195f436cbf6e5505f3ac9978. 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/QMDA62160256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cecabffb8b7658e9a4893a42b2cda952f465f75323275fc608d18e7f80d2a7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA62160261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559a3fcbb55d014088710ceb36750d7f8d3da4bece49ba5c49c663454724abaf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA62160263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c8c8bc95d2287f7d0539e27a0bb54310060aeb2b111dfa2f312017045c185e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFMF2213730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88ccb413dc6d9806017b7cee177e51bb29203dc6d3efc35ee985e1249687d3. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:55:57Z), 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/QM4TW2347591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7042d0a2de19e44f1b646d2e043cdaefc1a7bb2fa8ee39702a1a3b8de1608b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:32:02Z), 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/QM4TW2347595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3559405ccfa666f001b5ce7b06fdace03fd6b1f91983016b404a6ebec2adff. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM4TX2329935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86b1ac5c4d5c1d97f9c5bb505f3953f921183c21f37ca0c0fb7d4445ebd385. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TX2329939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe564492bc3127fa5a7261c033281e71ec877a886818a9b86fd4e58b82c85e43f. 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/QM4TX2329940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23018c1a9d24e0b33b8e5f343e7323a620454654fe31349081108531f09e1bef. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:38:10Z), 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/QM4TX2329941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a01bf5663b6e44107cfb580873cb151a1e0ad5bde1b9d4ddd65db10a7dde8e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TX2329942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68f1726844ee7d496b83f6358ca69d02d1401b1b48030cb79a8fd497298c5b7. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM4TX2329945.