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 0x0b91ae902dcb0c38d6ee2b73732af74cf025f41f814b5a46d3ff47d82ebeb843. 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/9583b2b6-5c7d-4413-81a0-db1e85441f8a.json and https://artists.proofprofile.net/proofs/artist/9583b2b6-5c7d-4413-81a0-db1e85441f8a.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 0x12d932798dc6deff39f954ae6edf8b7624f2f8ff60eb00ffca18fdba82b36a2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN82291263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cce5fe910dbb7cd9cd2167fa3de782272374455c7586082f3a8d3583e33be3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFK2312820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed09c5af3f2e74c8f7e7af61ea50618eb483e5fdff393f4cf4f713f9ae94f57. 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/FR96X2441189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794958aebeb92ad13862dcc90b6aaa4a87d52fb3b375f6192f7f9a834a5a5606. 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/QZTAY2330326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1477ac7c192d1320241579dba1d78d51295651c7dd0f2204fbef68874acf281. 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/NLT2H2400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f20557dbb9b00c2cb1ec55f7054ab7013fac0fd56f72acc293ccf620e5c2d9b. 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/GX8LD2366319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ec06c70ec7f2b8689933093d4c1931edf7ea624dc8c02036ee2f470a03066. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX8LE2215745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f264837f88e655400ff03de44bf54f6dd398ad879e0813bb09ff69ec694ed9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72296510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c3fbb7a10ca16b0c3b5c41695eeea80cfd6c516db35bc5c2b7498e25e388d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72219867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de21517859bfa2573ea67269efe2caff99828be405d2125fe598bff57c7d41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEWLR1906401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ec5c763ef9628c1c2f88902a0906b0fa496a21378bb5d38daf3f3904a7fcf3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2521731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b3fe77f6cfe6fa7c31c0abc56254cf7245924e6b03ab5e0cecd3904cfa9e06. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXESV2485657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf553e9117c38c969ecb4c9412a1663afb67036a2df4dab1a045e4c4ff8323b40. 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/ITKNK2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4a204598d015def7b0a102d82aba0b90341203c6f5762e47ec63b14fe27b8. 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/GX8LD2326913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f0bc231f1cbcad0bb2954e2ab9d8d53fe9d5924c8dc46a5baf2a980d42d6bc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GX8LD2321245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a27893dd78b2339b58cee1a90af6e8a212af343c0f6b547268e63008a5a5da4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LD2332117.