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 0xec33f7a6c41db2b19d5fc4f4efe242232d3c34cacdbf026294e8247c0e937b8c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26802ec3-177d-44f3-bd4e-a03850a8d0dd.json and https://artists.proofprofile.net/proofs/artist/26802ec3-177d-44f3-bd4e-a03850a8d0dd.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 0x8951ee47f8eed39981ee449a4ce1b469f8750876016601c9b9c46dc141d6e17f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SE6I32422994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f1e3537e45ec17300c30237e97d2c38e9a984877b6d5e4c5e8132059c118e4. 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/SE6I32422995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc461a82fada4d85069bb09c6952b331815d785575d48595c0f47d1abef2c9030. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE6I32422996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d9c4daa561ca1cc54e79e6829ec46c18acbcf10a6304cb5b47f7116bf59250. 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/SE6I32422998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179e38ddf8de15e4dda78cbdb390362a5c1859a0790efa9b006a97d02f2a8d61. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6I32422999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0784dc0edb037f30649850c39b807c349d3d4dbea9f19bccf4ea9cf724d2b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6I32423000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125c72decb91af1e315147d54a530ac9c07076788f812ff7e7d2161c2946e40. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6I32422997.
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 0x72f50161cd542324f98ee8fdf0fe18bd6fec3f0c7e3819509b0c78e79ee7aa29. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SE6I32423001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecf4ff75806de3e484035ae1e2fa93b6adfdb2aa0ad45ac29e6fa5ef805f52b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:53Z), 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/SE66N2380853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e7d51c6dd3b7724606c8b056c83ae5921d57b612e9047293c1ea56dd311f3a. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZMZ92567565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929a485de780a3d594dfe5ec618fe6a22cdf58aef6da1832289c88daa27c3889. 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/QZMZ92567566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd5ff24ed86818ea23e62e19f9fafc567359455680af44cf11772a06333b35. 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/QZMZ92567567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb3e0dcb91397fde9d9db90a4579de95b83ad0be8542a97ef346a084fce6855. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZMZ92567568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9d6d85c4d2b1d4be485b55cee68bf7709e50551987db38c67e9e92c50619dc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:11Z), 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/QZMZ92567569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f7ef24b2030a3b58668c123195328e1df454ed1241e9a1522be23915d6a57. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFR2357479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d53c27446e2ccec899fd496135ccf8a32f277a09206d459c07049c9ffc2ee3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTVM2455757.