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 0xa63960ca3768b67d944374f7a30020dd3bac9021579e6a14ff285097ed74e72f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4e5ed0d-0ca3-451f-95c4-09a4bc0da089.json and https://artists.proofprofile.net/proofs/artist/e4e5ed0d-0ca3-451f-95c4-09a4bc0da089.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 0x53ad0fbe3ef2a36082d68404fc4b0f0fc89079ce8a1924f3165f711b67581219. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX34M2100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63317aff5c39d05332a275020982f5457de0b2a255cbd732868faef8de16bf34. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GX34M2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e03d0edf015db9c3e3e4aa182dcbd8ce0fa8656e09e6aa3f5b7ae62f9a80ce. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GX34M2100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5632c6cbdc6ccbcba6b0b456e7e75115252f9e643ee31ba4e09e3ec547bc7a3c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX34M2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3488751ad028a68de6b03d4d09c4a36daaa090e48778808e5abd535d0d74a8f5. 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/GX34M2100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba689919f25027c1bb10cdfde587dccf7be93336508a26df7af7ca46ed50b1. 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/QZHN62408579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c478cdd1575aa4e114d1972ac2295f2e6ff7240975cd19e3ce7d49cfc6cf69d. 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/QZHN52488056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c11792afb03728300713ae52097f9e2e735b88741cb21cfa5173a008c21b438. 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/QZHN62408580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe880386ae00d8c48b2fb4d8732e958b48258d97443241b0532bba9525c2f1723. 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/QZHN62408581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282291c540d6c059813104b89c6cd54111cabcaa7d40854b17ffa665fa81cb29. 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/QZHN62408583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa499a1236af400f07e36fc7492a2051228907d03b9092fd025c394424065a75. 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/QZHN62408584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73bb0bbe86fc8f51ead41b28b53ff2e35f31a3b4d93218ea76641c4e0d65803. 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/QZHN52488060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e9d2903c2276c5a8eb41f58a929b5e08873d8b6e9398d38265d5ee6dd77df. 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/QZHN62408587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5378ac3f1a96ad6e694f1a77958a54dd140dbd9329ee3ad1672f66b7b027c4bd. 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/QZHN52485227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc8ed3e03c47f710de88c3af21dab6cac396bda13432fa7ad99eddee3b4cbc. 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/QZHN62408588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8726037954a145caaae6f3e98fd3fd118a94bbd36be8c7d3d71c8dc47d176a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHN62408586.
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 0xb033475beff6448bdcdc4a0aab97a5fd25f9a6308fea3161a86866bbf81d44fe. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZZ7V2467205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273562d67531a27f0f44e1e0813cfb91868004452dc0ee79481aec768678780. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:37Z), 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/QZZ7V2467207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0c73dbf23d24b3aeb9a98d1c08f5cf8fd2a77c12bb14954f80fc3a55efffd4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ7V2467210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307aeb5f9abf32bb5e5b3c512a74736069276f3de8750d3b5036e8281b822e4. 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/QZWFS2588374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df09b73bc800a43c5592cbf0ccd6650f707c540a3d217ab3345cadbc753039. 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/UKYT62300186.