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 0xfd89a58fdcd790f92eb23321df1280b7b441e62a2b8d5f1a1daba56f99563090. 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/f9170a28-45cd-4f92-9c6c-a949bd2684a1.json and https://artists.proofprofile.net/proofs/artist/f9170a28-45cd-4f92-9c6c-a949bd2684a1.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 0xf141957b4a9c374d11d0ab20d53b851e7d8e06b231054f5d73465e83c95190dd. 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/ATT250609400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ecf41f1892c8f9b9bf3014d2cf0c49ebcf98b831e21651d8ec40c802f6d7fb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:57:25Z), 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/ATT250609420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe292669594de88bd80400e987c224d7932c182ce6461a781efd8b4b7ca98386. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/ATT250806090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2b3a0f2a309a720de3d3d424bb49e5e7fdfb701df33b1479d67777c7c0dab2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ATV111111004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb09af66d78f200b27276fa104cc4e8070a49c69ed72cf7e9a3e78db4a43020. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ATV111111014.
Blaue Augen und ein Lächeln aus dem Zillertal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e22fb77ddfc7a698527efe0808a3ec2c789a8cdfd497ccf702f8f5a73a6b4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ATV111305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1703242b4c818a9c782c4521c65215891c0f94a9e331c33aee8c459c4860ba3c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATT251500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc384fdb9f6f48f83005af89e82e911963cf8f3225cd540031e234e361a0068b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:07:32Z), 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/ATT251500850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee73cda3fd87cc108ac202bd3b0e6bba917c8e7141044b5fcd0c2eba0714d05. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ATT251500880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3dfd1e1be7410ac32ca6e4cc80d542d8bcc4014c89e1ad5505af6ed292c36. 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/ATT251700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337250d71ecabc71f54317d443e6d8dedc677cc39702518ced4aa7f6afac8a54. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATT251700450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203ca77b5ef18855892883385f218266c88d5f897bf3c8946fa0f2a3c25c5419. 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/ATT251700490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b24ec724ba97998f635a040a5511a0406d3281eee8fe01f34ede97a0cfe37d. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ATT252207370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f03b9ea919da23383e95929453e59feb80f3b62eb0d911861f18701e735fc9. 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/ATT252207390.