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 0x2f178d259572cb6847c6410a76fbc78c20edfc51561f2a148df3d48c0e6439c4. 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/500286e1-cfa8-4aed-b589-70daa9cb6dec.json and https://artists.proofprofile.net/proofs/artist/500286e1-cfa8-4aed-b589-70daa9cb6dec.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 0xc67d544caf96420ee30f24c7640154056242eec59a899ae6a0d2e59ac7469859. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTAY2222568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bd2d2c4c4cc2935c9196a2503b589d3e7708b130d41bd19dfb871b6b009792. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAY2222569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b4724ceb167536e239ae462749c056047575ec150bbcccc985eb5af252823e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAY2222573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf410a2ddb01d6bad6840c05e04700427fb3ac4681d360df5111d4f9248270a55. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:51:01Z), 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/QZTAY2222574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b4f4f68627f69bfa4cdb209df8d8e5a44e84f2f93656ad48b48d69b2e83056. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:18Z), 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/QZTAY2222575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acf229d7e8bd44d43334a4b10a2f4b3996753c1c81f929006bfc85447dacf67. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:37Z), 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/QZTAY2222576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454ec5a2fa6b2a444a1578a20d2bdfd09ad592790138bd322129a44ef139cc87. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:05Z), 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/QZTAY2222577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eb67d8746a8b8da8c6a3baf0abf03e8f25df4e95bb9fb109870762bc50583c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAY2222578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec886a5c7feb862adcbf0c6c8189fe31219777c9a29a1c3cc6142a58503368b4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAY2222579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1060b1b4eb51126c325db9d4cdc5bde6dbf80be64ea0dfe55d603a0794a71. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFYZ2365128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a74fe2892e48b4aedf56546b888ccede683a75e2fb17b4a70785e4f129a5e47. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2365130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dca4f713f3a4a518bc873b6f90ae9ad55ff44e28dd3bdf409baa7f393ce7fe. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:44:11Z), 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/QZFYZ2365131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd5dc7ae4c815c8a9f8fb8081698c50433cd020602d7c640189f2066c5b7601. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:35:00Z), 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/QZFYZ2365132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fedaec40aa7e622fd67e32faa926f18dc2772da779afb90542a509877e74a54. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYZ2365133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff9c3d4bc9048972ea8f868b67456a68acfc8667205e4620ef87736d26a77f0. 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/QZFYZ2365134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b2afe5f2ae30b2b98eba70d7ee6d84a9dcecb19c13c768aa0a7092cdc66a0b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZFYZ2365136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7def3629ab5745822511cfeef1eee50e00646c24b6115f6700a389a3cf0dfb85. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ42366304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608728b3a69e156492e92ae0fb27751708a6918d3baf17cbdd58ea7a0383029d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUGBT2315796.