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 0xb74a0041734a884e111fafb4669479b1ccfabd1d28420c1ab46b0e29f00fef51. 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/74f2399f-ead8-44e6-a8ad-92e130dd9e3e.json and https://artists.proofprofile.net/proofs/artist/74f2399f-ead8-44e6-a8ad-92e130dd9e3e.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 0x1e54d52dc2f3b4792749839e5ccfa5032483077ff673df981c4ad9978277eda1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWW2391154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db28e5f6afe99cb71e804f130eede22598ce37d1781fe5db1e0fc6fc2693f2e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWS2325022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0a40a2c298c2d7506df5558cbf65986ed15ecaa4663eb3de77a282e40736d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWW2391155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9957d96ff231ee71daaf5d9ac290c01e62284cc8ad8a8f061562b304fcf8cd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWW2391157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8dc6b163cc4bb1ced16d4b7e60e714ee78ad7aa175711e62045f9d56e38bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWW2391158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe86a6503cbf2cead9f14d89abcb6d47195480f6f3ebf0ce210ba08dfc27395. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWU2365786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97f4f07166f4001a919461b283b524f4d3be65e4be742d93600b49f81bcbb3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWW2391159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a609c4666a04f24eaaf71801fc085d1db6e94c773729fcefa6b6c2c7de1f7f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWW2391160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9a5463432067f3444992bbb5a4334cdc69c3e54b399f4aa79f93065d99c9be. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWW2391161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc127ac7f98e3c2ff86e1e04fba038493c47654315a7d0bf447935b4d72a9a00. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:38Z), 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/QZNWU2371028.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5865fbb918af324d4aed4b388147f4bf64b7377621088ab76ee8dee0562710c4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWW2391156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acccf71a6b99d4e064040fcbf1f1309a5404987188ee9318a3d57416528d45e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZDA72380630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfd8ad0832a778b91920728128dceb4a54bed9c4e7ac95d174d4a69b85ec454. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZFZ62280534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43df9227f91e29cc694443c5c4088e5a44a4a02ef99e36fab0c2816f9ce014d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFYY2270366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e481d3a943dc1fde90901e56cdd333700e40ba918f6b07883a5a009933e689d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTAU2326785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa937c213bf650a0a5bb8877365fed71880f40a11fc025b82ea81ba9b85698d17. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:50Z), 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/QZTAU2326787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01febd76f56dc04b69e0b2c33f28d0aa30bf3d7d363da3dcc5e5d8032e33fb8f. 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/QZTBE2368375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110c4931e84d9091bb9af3487334b46e6de731412ee3820e5da4ac75af71d21. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBE2368376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2aa0fcd22ef4c5668bc53949431ed884f6f7f440afeb7287254fb97a9c4eca. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZTBE2368377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a5cd0e8604a8260b5c4c7b50c916814d6f0818c3745883f1dcb33c1e221a6b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZTBE2368379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc24e71fc28eed294a36373b3874a4d4f751591c5bdc97581824599b5adb049. 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/QZK6F2495390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc7c88edcabcf3e8ea8fd6332fea0ca45c410cf9d2c74097ab2e2928c94031c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:54Z), 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/QZK6F2495391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b28583d007882f51c4f8879930383e02a03bbe4f8c998deeff13f888e1944a. 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/QZK6F2495393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d08a8c6df7eab27234f8714598f65022ec63d8a5cbe9d700799ec95ea43a6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZRP52469075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742bfb89cb89d39c762fa1317440ab66ad36d16303c471a7274ae336ef363392. 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/QZHNC2502707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a5f40e48105f7a12ae16e84de03bc921865a245655bff02626806641f3c45e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC2502708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b138e1446f745574783d852529aefa87438fc0dc495b841fa16bb3fe27b017a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNC2502710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8adf692ec57c9580bba6db90c7990527aa944c39eee2edeb573c47305f3bad7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNC2502712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622fe842577255d1c4cf2bde8579a241a7b0b14764e7a98b12798ca9c658e651. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZNWU2390107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0445a35ea100a85af530c5bfbf6c9e924799c4c87db977358dfa3f14f532e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWU2312923.