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 0xb385592254c5ccd8c431c788b90c2f30e0e85df96dfcb75ec504a4e6104f5236. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad8d8e51-b5f3-449d-8fd8-07daa80f6d03.json and https://artists.proofprofile.net/proofs/artist/ad8d8e51-b5f3-449d-8fd8-07daa80f6d03.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 0xb04e93ea8930fe6ea4685a9d4913cf73d0239e27f88ed41dff1549eba4c09b7c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHM2325123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87c15acecc8991ab31a16379112cb3ae00134624521d09b2860805b8c94f4d3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZMHK2391967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9423c0107679e4f3aac5e3c637f428d5db2c3a91b6e073f7d78e02987bba52d6. 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/QZS632337860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20301af3a97ad9e1e345863f8e426e07636182ac8c3dd0a743ff207bde0876c6. 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/QZMHP2496031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f5b70bdf1e1db851a29eed7dbe96a825043bad581e95d7d8b1c9d3c8cd0cd0. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZS652460578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d3c717b0f9377f3a83acb9d09273f5c238ead79922898c943ed6f681e8a0e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMHP2423983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb66c5453f3f19867cc8a2a4a7d04d208f4a88fc9dffa1afad71ba0afc1f7cb. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:50:16Z), 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/QZMHM2530858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0cc151848e44970fca9fcd86745fa6596d48d314faae2c0f50225c9b4cf09f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:26Z), 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/QM42K2581737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4517dee2b4dba392c2ed56e58cd7924b95f9346f9585a47f26594fff92bb961. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:51:51Z), 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/BK4DA2533996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0095aa001b5a05b2318c3b9868aaedfdb019b48a60a656a723ecfac6eca7635. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BK4DA2533997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a35b3f9b234a8ca98ebc3c2bbd72a56580a7f75bb82421b86e9373fcbc3a281. 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/QZMHK2294382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d385ccd852e1c9d49c88cf751b2e83347a3d0d03513c214a95ba8c5cbcbd8d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMHK2340556.
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 0xd60d41c510a920826b2332052d038aab92da2dc479ff2ce1eecfba9fd71e594c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42481992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445b1ebc44505919ba13cca9fa0c262bbdec83dd6f723acb8c6b44deac9c23b8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMHL2246405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5b2d6617cde897c606ea0c59eb7435f38ebff75f75a6c5bc1aae04e21d8708. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZS662232572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f0f3d0edb669f7874de57d48ad801b42a762c8eb949cd932e7a90c158dcced. 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/QZS632425155.