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 0x7be02cdbe3deb66c1d86f4212625ae4edee451266b21ae58473860f8737f6786. 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/1e5151d8-872c-4fe7-9e74-d4879851b0ae.json and https://artists.proofprofile.net/proofs/artist/1e5151d8-872c-4fe7-9e74-d4879851b0ae.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 0xdb66f597ff4c018952f260a683d7fbed2ea9a39a6a998d8fc0c1c71177f7a9d2. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHN62145169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd93b01ae407a62e43da4a7f645ac72e158cec0cdc7a87966f739d3c8a387922. 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/QZK6P2219753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd06418e2f4b8ac4433444c18f3d2db2978ac9a789ea22aa66a0a3867bf1837. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:53Z), 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/QZDA72319846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea22b446c9b1c730acdbf07cba5628113a661848524cd79427e6d0738f53e66. 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/QZHN72306768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a7f6f7e1eaaf5f6b8f7da2e13d4e986762134c72a367d342f325555b4ac2e8. 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/QZRP42367692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d1d9aa8b8cd0b40c4d4013295871265e1a51ee9227c509687fa6baf9ef48ac. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZK6N2368974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58be78c08f1c49dae6b3a446433a80a69fe79a9e0ec6ca545f7d328de0b0231c. 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/QZTB32340964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93038ed8327621517b5eb41fb3bd0d6c21c8449b94019a0a401e6cbfdf2b6153. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTB32340966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea54fe04df38df6422ac18b229b4d7d64d1e90ffece03e398f2435ff08eefe0. 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/QZTBA2472686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937b2805a319cf53d212a5d12de7ffb116e712de3ac692a5ea52d178aae84cfb. 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/QZNWU2459607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82afcfde728629bf0fb539dca9a3cdc8c75899ab70c6b3b1cfd6e8216b8bb9a2. 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/QZTB32463604.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5fa681b8328041248eed7f5bc37ae528df7cb0fdb529524c30b26f86d475d8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:22Z), 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/QZWFQ2493773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a5a8706edbbe86717da3946b0165e782576d1ed2bd46e725e054937da97a1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFP2406557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf6fc491762e29248432fc89fd3b25145b38b5a84f5caeecf6c757e22edc0e. 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/QZWFQ2499693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5fa681b8328041248eed7f5bc37ae528df7cb0fdb529524c30b26f86d475d8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:28Z), 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/QZWFQ2493773.