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 0xa1460dbc4395f5a7455472862747849c552c39cb35c41660291401be83cea530. 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/8f6e543c-2b9b-45ec-8834-e27dd035d648.json and https://artists.proofprofile.net/proofs/artist/8f6e543c-2b9b-45ec-8834-e27dd035d648.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 0x99742e7915f909c08c28502c66923fcef1ff066cd91b1a7dd535079c177bdee0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:39Z), 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/QM42K2139402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4661d13dd5f6ce79de235487e296c52a849151e4da6232af3636002a6027b. 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/ROTHR2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f3581fee0adda38671fd64728b91bf637db4f3bb20e71d2b66359e487dd3e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:06:59Z), 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/ROTHR2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac7c069a6a46aab83487a2a53ce2e4346f92c3f61e33210b40e080f10a9ef2e. 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/ROTHR2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da244442ac9542d1d5454a6ed5819053d2a706336f19ade18f897fc5b3c35ca. 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/ROTHR2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4661d13dd5f6ce79de235487e296c52a849151e4da6232af3636002a6027b. 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/ROTHR2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab7526f9ab4cc1ba15effa8f07e119429e92943479dcf4099fea6cf7d996290. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ROTHR2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa3746708c187eaf3ce7de7de43c30426a12a5c917450a513848134ad9d35a6. 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/ROTHR2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f3581fee0adda38671fd64728b91bf637db4f3bb20e71d2b66359e487dd3e. 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/ROTHR2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c59475d305869617f271a8727ab8603d056faf211515675404c0974cba03e8. 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/ROTHR2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc23624acc182cd5ee530bdf65df2ecbda7488546e7102d9772d3f5008e6406. 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/ROTHR2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb738e1af3baa3050a9134e392afddc4f00298ab3b3199de5873ecb6be9df6a5. 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/ROTHR2500028.