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 0xd2d992404eefe949b65b76db8392c61b47ca3a2280bcc54448c9f000721f5e24. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29a3cd8a-e347-4e2f-b948-f2939a357e39.json and https://artists.proofprofile.net/proofs/artist/29a3cd8a-e347-4e2f-b948-f2939a357e39.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 0xbbe8c480b3e612da024bc7aabc08fe4fe7f7f451fd6dd7afa4fc78e80bf34515. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHN82242522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac9d38f6943e5f0d34c7a822ed30716d183b08490e13cb3de8d744ad31d0e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB82267359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ec78c23a31fde6f1814ef613c581fbb5cc6a5f22081729e9bee8870bf5a280. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZFZ72223450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdb894a7bd68120c43b747140691a1b7709737047c6c562f79af6fba141e3b1. 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/QZHN52194319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafa9ea29587a7419f44c9a034abf9f411b71e9239e1c3c3e84ff45a97a346a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFZ62355452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20898976ca0754e8ad63e2b57b6e2b4a7756cf6154acd3824d3ff4312f4887f6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:04Z), 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/QZK6Q2354604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b554f10e7e2d25b75b4f598638991bcc516781a9f4646cbec3889b06157672b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2319310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a476c4fe1f3097531ff32ccd573a84ed276d2d345f8d775cefcd64fff064203. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DGA0P2312311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8040bbcdb40b891adfaed75c97b60705ef6025ca7e48bd7482567f762a01c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DGA0P2317190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3026e045e65625d87b65bf13a82ff52d5e2ac5eaf2abe9413cd3b66f59bf2ac8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DGA092401730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd30a7ca877d959ec6147a969e4e44b070bd21af97136f80ebbc4022336f547. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DGA0H2454251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa99db78b592c6bae2dd5e0fdb5f2dead2b8e4eff403fac4fd0a077a53ea2076. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DGA0S2433601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4fe224cd2d0fab6a04bdc087ee979e980f1cd6ddab4ccb034600661f439519. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/DGA0S2433602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc070d2709c33ba8b1e3da0c746d25cccf8eab445c97b7975dae606b0b69b28. 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/DGA0S2433603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fde6b6ac4932295289bfcccc2a97dd2a8a54f8a413a40ab9b8626d89afdb277. 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/DGA0S2433604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c24b9fbcc8a18a027574bb7e87105dfb13dabbca7354ac46b1b2809e0b3684. 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/DGA0S2433605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487739dde33a52a26df876fc0cc47ed775fb8263d4342bc7fcf24ebd0b5b8edf. 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/FRX282559887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9960d69a05d0af9b487a694848545f143b7a874732857fcf38673ba720361437. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FRX282557317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8d5e2af5ec751f07bdc47edb27d6e8a7b2b26799d6694880fd211e8208d7dc. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX282559895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53fb26e5f3d4a7b6a1154ee1d148da438243c373da7f3ca9103a799c7897281. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX282559901.