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 0x0c84a79760e25d4e28911ff77a8ecf189df2a73496012e895d3b49b8c03866a4. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec64d22d-3cb3-406b-92e2-4b9a9205aa04.json and https://artists.proofprofile.net/proofs/artist/ec64d22d-3cb3-406b-92e2-4b9a9205aa04.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 0xd9779b90039296ce36f212b161a7d681f1e9f29464419387f42f3b3838c8fe89. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2550752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12fa221e6682d9f7e6cdc03bca9c4c72cdb750a710c9487256c3cf1a51dc29a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GXD7G2578943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8efede17b9a2020b8175beaa524f94cd01354b4a3f2df91ec24b3413571881. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:36Z), 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/GXD7G2531210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322eb7b59d88187dbfb769c1cd16602b898b256d39c149d235e9303d85edfc31. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXD7G2575916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70b5e62f98c51c23400325b429dc187bea93bf6792790749420bac35066716. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/GXD7G2513805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db415adfc49a39597eef610fcfd79a0e798d97416162c2b6a4652c4ac7f042. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXD7G2537199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf734f6ab24ddda5672e3a91eb325b5c5191d3b1c09be82effb2e32e5f7069952. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXD7G2597764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4b7384149cb02629ad6accd4a7e3fd034ac7fc498e23611914b494f745b33. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXD7G2584709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cc16abd6add981c8ebd89ad6d0d9ac90212ee2efd20ed69629c003f562e9b9. 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/GXD7G2596859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2023e3a8e80519c018fd996030875ab0101a59d3a0686939d422db297a9452. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXD7G2505959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a592add360da82e9e0049fdfe00e90c046b60dc3ac3be4a7f19bb2ac5f39a7c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2595620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4743a7803d5839c72a8d9a8bcfd6dc9705fe79c9fcd60d8309dc4ab19864c9b8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXD7G2503287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b3d6be8d056add1e5bdd626a2de9b220012a029f0757d09b2b0c613bf4c17. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2546298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfeeef90baddfc9c5e398fc66f4dd25bd5374f496f5b95ff8d326ae5d8a8d54. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXD7G2527009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ea8515bcc0881ef7aa68e60085df3ba3052759658f8da1b155551ede768f7. 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/GXD7G2544754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76354403cecc6a5ea892d7ca27c33a7c7b3254b52560d9a11f1b7f7443b9930e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXD7G2596262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe096cedc3b6232679e6fc97019340b9697b34e0cb76d169a5581c1dd7d7bd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXD7G2548270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5cb5060bd6c2f7b18976036877112d8782a321b82997a0bf132711a7a0cfa4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXD7G2545710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c200dac4c89be17a5e033cdaebdc2bc9c6f6142f5d7a569cd5a5774894d404. 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/GXD7G2520903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed10228f148bd0db802f88d6d264ea767bac36648ef1603c917d50269a309a1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GXD7G2555356.