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 0xf02d35d52ce6492de60e601bb130a26d2a892b31a5f22a2d2137533745ead036. 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/42b971bc-181b-4189-926b-36a482b2c146.json and https://artists.proofprofile.net/proofs/artist/42b971bc-181b-4189-926b-36a482b2c146.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 0x4e0a1fd4d01d167c6e286b1916b629471cfe121f0f4ef3b4497b7ad5ab9df56a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:14Z), 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/QZK6N2110707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deb6a424bf75c7a4cac1a764b2ad1da382da211575be5b69173a04d9114cb4f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN72259148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e8c2d71a83e7cda9ad2b2f50411e143a5aee34bc116c7cf4a9e9c1fc50715. 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/QZK6K2356440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88317e8e741e3f9735e2125f1f01a090d5a5026060658cca37064931767054b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA62388875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58da1ef4bb84865e3d9a3298456a611b0d257d69501770cf4bda4c4de3018de3. 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/DGA082210406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073a66b93cc58d039d8a725d8a1d8c8dc8086b928e03b19cfc34b9f31cc047b8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2423945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dab7039c7426ff9893fc9eb42488a2cb553f952d9be9640a69289f8d64a46e. 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/QZK6K2459174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a9e46517c0f7f6451f2252d224ba502c9a5c47ff2d6ffff0213089248e51cd. 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/GBKQU2448537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30221da5e685c6daa76d57665710df2857722c1c9a949f486159204bacf69e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USANG2444625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3578418249ca65541fd3623baf8ae96523381aa64fc34e56e1ab3df27a2fe17. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZ5FN2522173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc005d64b5f192f05d7fb2a83307825224397168762bf95491742bd4fbd26f54. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ5FN2586609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4042f568cfcf20080395680a8e5a43aea99f9589dbd99d264009a10a8aa55dd8. 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/QZWDE2506528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b596cc699d29dec6d96edcbaf57b2ae6804b0bc58d237ff61b1ea06c4af0c87. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:47Z), 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/QZWDE2506530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfd0024daaab76d4a58a61587a384fdb76f600527b977c395b0ce9e675ea011. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWDE2506533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643a8b04eda452cd413d27c8297f4d4d5e8a6b1853e185450eb2283ee11a6ab. 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/QZWDE2506535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85be8c370298a01cd91c5d83efc70dcc4d8e001f0225e481df4bf26d6e599531. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:48Z), 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/QZZ8A2514586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f7a65fde4baddb27b59da6694ce6accf0632d1a3827810262b33ee5ab26fd. 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/QM6MZ2309846.