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 0x0c85c848cf639123bd60ceff7bee4cfbb195d54a8d079fea1b470e49fb87db57. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca7ae2f0-3c18-4842-8d75-126017f97f80.json and https://artists.proofprofile.net/proofs/artist/ca7ae2f0-3c18-4842-8d75-126017f97f80.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 0x15c986531feb320eec196bfff3d931bdd40ab433b72bfe19fdac4e2f2e9aaad9. 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/GBMA22305066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f706c76040b5409f0eee3a25191ebc74de9ea8f642515686d29732578c5b079. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:44:17Z), 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/GBLFP2466733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7709dbc7c4ed85bd7629188bcd6c1440c82f3c3e36d8c48e46092386a3d4dca4. 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/GX3Q92417893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a56ecfbe33a41da076caff7cc8e8327e228e7b5ab9074a45899701a6e6c93d. 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/GX3Q92477722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e81da6f9f426c7c8505d7346829c696bf43a68abcd4a8783e7dabd6e1e4da7c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UKXN22407683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa915b4abf9883a3fe560626aaaadf31d99f6da2b3349e478e9d189bd8ba55a58. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBMA22361968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4376ac31ec8825bcec7f8a680e0599d726298efbaf1a94c3581a4429e2fb5. 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/GBMA22396993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725b5c3e0572af22ff9f7558dbd6037804aebd09523bd867ecfb21298030f310. 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/GX53U2320511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff007cc89e07398acbcd86218b7d53cad63674a91bd4b7f8022d8d753b5260. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GX53U2448064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f3530b9b9f19648dbaf064b2f9e134c832fe3a3f41e56d6dd4e903fb81b77. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/UKXN22535394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854ebf87dd8c9d93b312a81728a745889afe55ab95658cda167581cf0abf3a02. 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/QM6P42555581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceafc49ff14a21d8ed8b0e94d0108c07956d8d063d171013f5fa7a9f81ca5e0c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6P42555625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a8a0ebc15f1c886e4fc39fa1cacb95e306ecca0b8d8cfaccee2b76e9fb1043. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42535175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd38b460e5939e2fa4e7b6855b05039587bcc8b722a5289e4302785a24236c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZN882406494.