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 0x6ae1cf0cfefabcdcf78f4b780d1437fd0c2b8c5706673222522834b605a61c9d. 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/5a4a4d3c-7cf9-468e-ad2e-3ebf47269853.json and https://artists.proofprofile.net/proofs/artist/5a4a4d3c-7cf9-468e-ad2e-3ebf47269853.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 0x81aacd52d87fc66529e7a8a443f4ed4efd3b6f0f4d8965a21a2041548bac8842. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4TW1647428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cefcfc543feeb7339120e90c54d9798abf35604ff6272309593a4b087a2c18a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:03:43Z), 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/QM4TW1647432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe917f19a4aee379a3ab35f1b12f9776ace3b498c5c1ff370998cfcee0077d274. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QM4TW1647434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676aca104090133775626edfd217d4a16b916016d13c9ecf09c24c964804a1a1. 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/QM4TW1647436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f97cc0a80d9c9bbc9ce65e1b06ed66de81f0351c70eeac07080ca80088ca4. 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/QM4TW1647437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab932133cd536f7e611563edc4cbb79d4436960bb3a5f0a555b8c2f4dc167a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QM4TW1647438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce425c7a502812a6842c637d56462899231a1d36bf142bd86c7d91394b9ba56. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TW1647439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8a62cd65f0c89910ef460fedc698d553992d59e3b543742fa98b83937b4f82. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM4TW1647440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aacd52d87fc66529e7a8a443f4ed4efd3b6f0f4d8965a21a2041548bac8842. 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/QM4TW1647428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605f97cc0a80d9c9bbc9ce65e1b06ed66de81f0351c70eeac07080ca80088ca4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW1647437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab932133cd536f7e611563edc4cbb79d4436960bb3a5f0a555b8c2f4dc167a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW1647438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88adf78c2fe293a8ddf2060fa5319711c349ea0d3fb40c37872aa289ca000055. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4TW1658269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc178098eb840f3098751bc7ecea236554327495ed47a9e1f29a7792f1564cbc3. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QM4TW1658270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca255ec8d74eaf425069f85c42df10d47990eb0f6741ab42f2364a3d8e60500b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW1658272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88adf78c2fe293a8ddf2060fa5319711c349ea0d3fb40c37872aa289ca000055. 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/QM4TW1658269.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e3080e30f761293cc6409c46ef9f28f1c9322c69948358c1cd85292b307b2c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NL8RL2437156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffbe07eb7d87fd16629d8bdedb77f7c6a500774bedc361a6f7a6072f606c993. 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/NL8RL2437160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f439f8db42397944b91215a15175a61853cf9779931b6ea451d8b4ccbbf526. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/ESA011940652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef592a43ad2fbbe28bf011eaea66cc9c006b09f9ebd09478da2bd073ed2601. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ESA011947715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea7f30e0458a5130d58bb9c159bd0e5a9492dca4e0a62397c089e0a9c675c8e. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ESA011951241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f0b8fe20a62002594c7fa8fd6335dd3be5b579cd60c13788998c635535a234. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ESA011967637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f439f8db42397944b91215a15175a61853cf9779931b6ea451d8b4ccbbf526. 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/ESA011940652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eadff77e9bef86bcfd7ef12120f7f67972fbb1bb0c0b0408c02067872512b9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:01Z), 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/AR5UH2503870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eadff77e9bef86bcfd7ef12120f7f67972fbb1bb0c0b0408c02067872512b9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AR5UH2503870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b73905e5d8cd5deddd0ee9f42fdf14de0c705a90d088ac476e6dc20eac8096c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AR5UH2503835.