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 0x2ab4f2381d282e99727fbfeb7acf10ce4e351e2bb078db45a505267381fe7bf2. 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/81ba2c9e-3f3e-4fb0-98b3-fc346cc8e555.json and https://artists.proofprofile.net/proofs/artist/81ba2c9e-3f3e-4fb0-98b3-fc346cc8e555.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 0x5bf26b6a35685fa80631594f2703c3f3ad95b7a89c81a9d30b7a44bb71c138f7. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZNJZ2333802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69228c57cde4f527a6808f3b23a9af287876e1abeb97de8a0244473fced92e61. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZNJZ2381545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7152237af253805b285feb2bd1b6cab6cc681af0f2d33ce2f37128f444c81bd4. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee3d4570b27d263a9b5ddf23e968015e967b4a7f2299615b214dcf35e196ce0. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423992ba7646dd4e9a94e7932c14cb0a28c418fdabf6c6852439b6f9752e61c8. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3bddc7d83355e266de412844ac2a78cb83402ffd961e317ea91a6b1b87ce7f. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3da1d3a1d4b454265d749466674521c86b0fb510d4f853d1be75cafd368a54f. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87dbae4a009b308b230424001fc4c745907b75453110ab7166bbb6854dd15c. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc6e865482244a9e8e5c72d4e236704dd7cf17602e0bc08f55977b566ea57cb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAJG2597121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa5634eb1c7a7e7ad3a5e17522e21b9f912eb0e3dcd926bf5350dffe90876b7. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea042c0d5dc3d6362e71e04905804390ae4e67e5b303c704779b810e0d017b. 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/TCAJF2597125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abc0138551978019a69eeb7a4e64fcd5ab7a4aaa28d3c022259143d8266f632. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJF2597128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9f230906816a023e0edefc87912948aeec92a69bd6cf6940dd4401e155e7b7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAJF2597135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da563748bab06a293f75a3fa52bbc750259eae2bfc0c00b5ceb062b21c2f7d2. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f127fd3ce5c007207523ae2cf2c485e67f5cc6f4585e04202010bda64c7d67d. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841619543701581c3d5104bdfe382b970f7efe7242e6ac9fd583d1d3851b59c1. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93abaf5077e01a05c1b5baed782008f235c64db5a448ebc2ebf070c26f62fbba. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/TCAJF2597192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6e490534b67d6afdc000d74e4439e4f045f4bfda32f384a44ba7f68d1c6d4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZ7R42456231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef72072889f272348d036fdeafd4feaed967271cf2589eb674228ab79cc44f. 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/QZ7R42456232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be02fe15fdb1051f89b5d39aa989051f1b1b77362e919adfd51b8bebb29b10. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6P42460432.