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 0x9c96a26c106215f95248c9fb1192033985db44dbc6ddd55c510acec71c45ab37. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac93864e-25e2-4efd-ba0c-7f54b7aeefc7.json and https://artists.proofprofile.net/proofs/artist/ac93864e-25e2-4efd-ba0c-7f54b7aeefc7.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 0xb5140428500ed73186512a94f1eddf9154ae67115900efed2b860b4175293bc7. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/TCADX1828781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6dc1de33b25d3fc99b028a3c647dba0b2863acf8d987892d2650e5739f2d8f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCADX1828785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff4577cccc6dfb3f5b66c0c17e65f453216751a498ada38bdb50ec48c3c6122. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:43:40Z), 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/TCADX1828786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31edb7bd9630f2a5c6e617a4eac8f714c501099f9eac29c2493bf8197ed2cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCADX1828789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833b62ba62412a5e338d5c229cb2859e8600c9f57ecb00a7399f4bb5554d24d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCADX1828791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4117d55a3fa417cd5ebca05216c0f3512ae65bb364b086ebf3081b74a3c75e63. 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/AUBEC2090114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eccb405f48a5635044cd9653cddd00c4be12ea00e0598185e7c0214368ffdc2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFI2155520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a7cc0ae4e7c17517e6135940de8cdd626c33151157a7a237f35d45ea8e45e5. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAGH2206582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c6b63a69b5681bb52f81a35140adde877c29f0737f53e3dfeb78f010dffbbb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:57Z), 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/TCAGH2206589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0a97e7c97ee83a329d73fc88c83a9d09a273825962c998bb5d3e061a7716dc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:59:41Z), 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/TCAGH2206602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295c80a8274449d4e7533c7c87f4ffd57cab61fe31a4b64cec1b2d4d5a41b92. 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/TCAHM2312595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7a8a479b502933fe666cdb490b09534f34fafc98b3a014d04e46170024023f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIH2450170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09d81c82936fc8ff8fd78cbf838aadf052216a22503009deecec24632f5f354. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/TCAIE2493542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d9be27b2b38053e92bb223bb5a9b361cfa3bb331f4c42a32494ea748d9a491. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAII2450222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7582547c01c0778d466fd88439f8ae4429c0268c2d8156f3dd4ecb39dae7af. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:06:46Z), 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/TCAIH2450266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc358c01f39e6b11e68ddb6e25f38d8bc57835b17b475c79b9030144974c2bd1. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TCAJI2518205.