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 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 0x007eb79eb1adf1814cd6ec60fced8cc9d15047f58deef3ab1a6a796f2524b800. 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/62373f20-885c-4cd5-85a2-649af1e077ea.json and https://artists.proofprofile.net/proofs/artist/62373f20-885c-4cd5-85a2-649af1e077ea.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 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 0x8a3cf8496fce2f68ad55ad5de623dff30d2d546799abde0505f182435672af21. 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/QZAKB2413098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f743d170e3916341224d4bf2cdfcea6004146f87f13bdb4bc9b0922a2723cf7. 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/QZAKB2413099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f21c0b276213827ccf86406950692af915ecc7c59a01a3c1c9338f8f0175b31. 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/QZAKB2413100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366c77e4c28a13cdb3f07b21cf0d39d10ade60947f93ef67e285be3f276a8006. 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/QZAKB2413101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6131de1e60f51b97f2d0635fb5d44fcac976d98230e6bd36605ea9b54472f. 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/QZAKB2413102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc10b040bd978f9eacb92f56e7ef0bba7b77196dfc8a9aac4b1361f5f9f0024. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZAKB2413103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b54898a9e66f5e787cf63905bf3e43bf7df610d8942b0ca990b793ddffea15. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2413104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c17aaaa7bcbaa726bcb64e6df60cf92b48a94aa58ce4dd4364dade082bceb68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2346627.
(I Always End Up) Fighting With the Pencil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aaedcef6d4bcf1febbc4be034fcba1b20bc72311dd40d239754f2ad79a37d3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2346628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7978ff3096f2a5ed6881c72faec3184731270c466c00574765461d7a6be7f085. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2346072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448bb3a9ce17a4b8c36db4d747f44d2735b7aadebc88ae8e839c0eba38ca8287. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2346435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29144a1e66dd0ed5983999013fe83fe81ffd8cf3e6ca3ffd5fad5f72620af2cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2346437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea0a24fcb4ef27069529bc50dc85677d21c60a0f83dc3dd809ed91e7161b5b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2346629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9155544bb2a6bebcef32d654bebdd1ba934075f1f46eec66dfaa86edb23186. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2346630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14814fecc96a8e5e72f12ca856e25fa824df0a5cb5a37c39817fa6d528aa3f6. 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/USLZJ2226660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e3ed6a9243e811fb9f7cdaf4eab0ab974522c6c49477c362655edb8007b7d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2226659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f59c8cedb4c01630d3f8f7090f8a7d88db25335cddef0bbf92954a7f7471e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2223571.
With Friends Like These, Who Needs Empathy?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1f683f880fbb16da83f63448cbe3f99ea31494e99c94fce5e82ce32e5b531. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2289645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f102a1ef0315151c801d5ef3d6dcf0bf062fbeb1b2440fb879f44ef18cc7e. 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/USLZJ2226662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b42ade62e6701cd56565d09dabc120eb9328640c7bfb5a5572e4e935f1f5e6. 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/USLZJ2226663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51283c7c5e3b9cf03b2c67481ba6281d494cc7636e82711af8486317d343c00a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLZJ2226664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5227d3d435b4ba6641af62c4e5daa660c3d239c6ae5f6eb83d11db21a243e697. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLZJ2226665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d53b58621a004547bb58788e1a548d085c824cdf2187c87a042e9c90c9d3a. 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/QZ4JJ1742634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f9816d64ef6c55bb1d80365552eb69df55de5a521263afb13d892e51185f02. 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/QZ4JJ1742635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13de5456c0bd1c3bad44e6c1d2a60fb6126332b41c2a3908af846874438a8a15. 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/QZ4JJ1742636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d328d862709589ea529e6c71f84e12c4b3fb22359bb424a740bc1c3a7081246. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZ4JJ1742637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce236e6d93b3dc0c63cb9f00ff0c6b193443333b5a171818d706b38ddaa1d26c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZ4JJ1742638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67a1a3f6b7f38251a8c780860a1736c059a8af247c0bcfbf605e1cde8f0458. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ4JJ1742639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeda86b054a608beecba6b473341f1cdce120424600128e95dbe6f20d9c51158. 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/QZ4JJ1742640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29144a1e66dd0ed5983999013fe83fe81ffd8cf3e6ca3ffd5fad5f72620af2cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2346437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39accc37d83d33ede7ed9f0c5ed31c764c024f03181d36a80fbfbce96561bd8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX1928611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeed5017df9701c93774b2f39283e1e8de8892669f56e37d78d03f9daa8851a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZFYX1928612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc21682fbc9a74b54005174fc8421828b5baeed1c24555b21114539ff5122ea5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFYX1928613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7686e560796ad3141abdc92ebe4d6957b8aca888db8b0d55ef70d369bde02b6a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX1928614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cdd482870e3a01c6fcf240560935e775ec24ff112694570ab76a6f8cdbd2ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFYX1928615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c14ae76be7833bc63e6a762b63c05f32aa3d2d59dfad7853a4e59a4c180da0. 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/QZFYX1928616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1d42ff40c6d02ee64e75015be1827a2612e4d3b3bbcd215bda81778c81d22b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYW1981226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37094711cdc704a503744776a71a9d8a15a5639e16ad04af971f946e00111eda. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZES91802789.