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 0x30ba7522a2476768625655cd7a482a6c9af7c90a6d2c3dd3f0d1be3a6c86013f. 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/16392db7-bd34-48fa-bc6f-6a3ab743b921.json and https://artists.proofprofile.net/proofs/artist/16392db7-bd34-48fa-bc6f-6a3ab743b921.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 0xd4175ee60b7c26245faad5c9aa8bb8468329a6b70daf587c71adbeadeb3435f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ8DB1700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e888642bd92ef8c6e052f125a4817ecc34ac120aedbf6b71320d8bbc521d1d. 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/QZ8DB1700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02a57adab3fb4a81d134408ec3328e5b5540dff45f9048d7b50f3cfe06ea92. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ8DB1700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3649fc417f2c99305c453642725b4db99e530e96848fae48710505e968e0cd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ8DB1700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e93883b1a3c23307583e21fe891243db483efbb3d690eacfc8a03debee805f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZ8DB1700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c6820b2f4a3273bfe7fb3c8a6c738c407854f2b994b8f6f380462c54eac6d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ8DB1700227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb846c34c78a1c77304232c35e2c23061cc1e4e201a47d55e099b3c1feb370647. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ8DB1700228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9e4000ad3c757edcd3d2d93656a7420d62916414919abdd9bbc4f4fbd13e4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ8DB1700223.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6754b97a68c1e4fd5ec0ed4f9f65dbd3764c401c24e71182062d2436072dcb0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ8DB1700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd301da185f544df8df7b24f71162d0ef58b00e50aebfa19f1e7616cd1e3ed7f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ8DB1700229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae1864d5232f055bbd90f59e21cc405c3a25253de47ebbaffcfaac1a78ce0f. 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/QZ9JZ1769877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2a19d92f878fa6bfbdf3f9dc5593cd79ebd12be47469b28a7ba3f86113b1da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ9JZ1769878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeab82f9c14f2c047bac7181c3bdeaea00f535a4c883d1c4763faf831f2106d. 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/QZ9JZ1769879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeda0d9f13c4c0f06490aec1d1e9e37dc84abfa4e5368b25771e55fe5170e76. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ9JZ1769880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab06d8aabbd237d5a91295a9b8ddc248d62df155ebcc0f8fd06388abb1985707. 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/QZ9JZ1769881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406745ebfa6796ff31e00123ac1c4f01b4c373560d858d8b601b469f1942c7c7. 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/QZ9JZ1769882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385d494dad3f86e4a8c92052c4ce967da1e82da4546950479c2611b1e87f8b7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ9JZ1769883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108b196f7454877624bba9af27e3b5da2447c0904649113a1de9a9a2ab2a578f. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZ9JZ1769884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde68b59968313502c9ac8a246e65babd78ddf3deb8a82d8c59dc11eff1a4ca79. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES91807398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259af64e08a390eca588458a13f9844c954cc595840d1babd70cff56fae60cd0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZES91807397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787bf904b2eeb88a14e211ebda83d6a23aabf898595708e51c8e9c2e4a22c314. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZES91807399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5585ec429367fbb3f3df2d8d2132592db112a98d7b2f626fa4abb2e0637f461. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES91807400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a5d04360b4bccfa2e5e162e4d23b871498ea2618472e6090ec5b636bb3a7ff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZES91807401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5bdc585035681304897ee68ffb584387755634bb2cbe50726a698cfe34def3. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZES91807402.