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 0xf45fec9a6d38ec2c0afaebc25d0017b2f474c7440e89178ba01cb3dc936a33b0. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10b9dc8d-c1d5-42d6-b99c-e7217b6a17bb.json and https://artists.proofprofile.net/proofs/artist/10b9dc8d-c1d5-42d6-b99c-e7217b6a17bb.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 0xb57a4f08b530df26557ba16d6a3bb3051f34de777145b1f17ec7d27c27fd8892. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:51Z), 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/QT3F82545317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a74158cf021f5458201f748990ee859d67c921c1f674065a7586226d7680d63. 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/QT3F82586710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871b5cf8866a6685be13eb17373e64684d80bd18dc499df07646da0b7d61113d. 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/QT3FB2562676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51353d96b8e78e1e47451c92525cdc71d3c23c3579776fe2a77f3252f87b750. 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/QT3FD2597242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79aecc616ce4698876cb80436de3bc613fd95ef08ea3c41c77074921b1e05d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3FD2597241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b9590cda9a52400b6b1b87436a514694d2ab1b8200278907ed121fd95dcc09. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3FD2597243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eb5c6e4e60129811d2c39e3d15b2eef08a7faee29fbadb6a557a1227e70dcd. 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/QT3FE2571405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa351217280adf6dd73da8fb5ea6437461213a8ab05928322b268f4cd375e81dc. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3FE2572005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee44c9eaa8fbcbbbccece3cc9ee1c7dc7b22f7b6dd9366e560e2f7bad0d69612. 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/QT3FE2572009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0415c326020fd775b14784c08e564e756b864e381555329eace07a98ca08cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3FE2571632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641ef50e811cbd0bf493a5d2d2ada938ade8d7c93a4811d40a6d27f046dc451. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QT3FF2518679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b52b251ee23a028584234e7b60a7ab090e1aa7b85fc8a50c7263bd0fa4346. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3FF2518680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aac8bd41ab8328e3a130c4ced211dacb43de77075cbd9e06ff470c710989091. 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/QT3FF2518681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab9c0202655788970b6faf12c137ed249907a00912d584870817f0898de861f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT3FF2582098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a0f1c7222b635783a98195cfd5c0b0321620745f00b46bdda0c04ae9bec94e. 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/QT3FG2536937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b25cdd48094020b93565800b136e0160f0ce050d96d637136218f4ecaa1509. 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/QT3FG2539036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e3ba6057ce0ed385643ac054c10cc407ea251abf7da0b82627c16d8d43d2b2. 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/QT3FH2517291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d7fb4504168dbe90ab82b56214a8500f063579a327f40f256832892c52370. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:05Z), 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/QT3FH2520064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058f4427770feb031df7dc9d985e387af275c8c51a054786c84a3e71a115e23b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3FH2520057.