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 0x1092ac196bc8ff34655d15cbaad7ae25de08dfad830e86f16f75c44113345718. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c90c1af-4c34-4c51-8cae-a017c0ceb72c.json and https://artists.proofprofile.net/proofs/artist/7c90c1af-4c34-4c51-8cae-a017c0ceb72c.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 0x53206b9487fde751fac4c62d9855e0fbf1227ca2d2f8a142213748014b1d0ef0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKXN22262282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38bba4f0bc4b0a4119d4ab1faf734449e1b7fca5aeef78ad5315dab9e844e41. 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/GX3Q92316306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f63822797f81fef881d195a5f04e5ad5c057f64c8e149db60d687e6a4d286. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHNB2489493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4b79d92ecc977786f19b3a6064318595d5427d4c3ddbe61b0bf6eba7a7e40. 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/QZHNC2442398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e9be4a79e33cf9928e562c6d504fdd67c825058f286f8aa0eb8423c268311d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6F2452792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccb17e6fb1000f18689faff90b017e171ccc5bc36da38514694dac586e17c4b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:00:15Z), 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/QZNWW2404550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760cf61347e92d112f2ea623e9ab48dd707f46df22691e7c38e49d4da629221. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:36:33Z), 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/QZTB22480902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87ad7fc08fad828d51d5186b13f77fcec23d20ed37e73435f40acfc7ec5ffed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTBE2406478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856d05be4a3f905f8870f3efd0b4f9c04dbbc552053f2d35b2b016e7f86c03f. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZWFT2420027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ae8135a1e1c3da7fb739c17ceb5190f5a0b0b4048a4379e93abfb9cbe7452a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:02:36Z), 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/QZZ7R2453905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a94bb69427aa087d2e035831c161dc316638e6332be92e2b2f83fb5ef341ba. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:31Z), 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/QZZ7R2453906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d20c6820e3cf6918bf83387e8e0a647d0d1a47889de886a102fec51fe3a7c16. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:01Z), 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/QZHNB2519265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4b79d92ecc977786f19b3a6064318595d5427d4c3ddbe61b0bf6eba7a7e40. 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/QZHNC2442398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b1b4fb768e873e684057f7b89fe2f381d43d642421d5057ce8e5010637e6c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:07Z), 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/QZNWT2594590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d7dbaec0b2deb99267e1163eab9fe83be1a7963f57427625bc926396631d04. 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/QZHN32576336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856d05be4a3f905f8870f3efd0b4f9c04dbbc552053f2d35b2b016e7f86c03f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:16Z), 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/QZWFT2420027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccb17e6fb1000f18689faff90b017e171ccc5bc36da38514694dac586e17c4b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:21Z), 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/QZNWW2404550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4760cf61347e92d112f2ea623e9ab48dd707f46df22691e7c38e49d4da629221. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB22480902.