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 0x21add5eca955eced6388843e338cd6dc8c2d941e351d7fce7c94de2426ad264d. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/768cd477-4a72-4c1e-b299-cac584e5b89a.json and https://artists.proofprofile.net/proofs/artist/768cd477-4a72-4c1e-b299-cac584e5b89a.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 0x6632231e25f45bbe754af86703f0d22e934430e0d88344f77cbfd9f7c6666e4e. 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/QZK6N2029766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d282ed6a317131b9a60fa47b1aeb8badd6dfc7daa00ec834842958a81e4779. 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/QZK6N2029767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7b44e6cef2ae8126dab2fd3e6afcb621aa728352b6612ddc863edefa3d1134. 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/QZK6N2029770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e8d85ce623c34ef0ebf196f737548fc7aae4170cdfa396b5240071739f586. 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/QZK6N2029771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c828443e326b2d0eddc0b1f7a8de613597495278bb0b60354713379cc6a747. 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/QZK6N2029773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35da9fa1f3cd0c9c017d314564da87d0ed36531c5f629e5a67bb1bd292adf84e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZK6N2029774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29aa318c73f07a2a3d813142a951873300b48a7cc64423340f92abc36b12edc. 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/QZRP52413117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73677d94997d44b46222930bc6a9207b40dc975a816710a3d7f814a608d8160. 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/QZMEP2155118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe199faf87baa640ccf67bbe95d254de85cb48e0aeb7f8606bd86dd5f95cd7e58. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZFZ42133327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4648c24407f4a6ff835e76c5c6a7af32ef7816a3008e39fea6a9f24bbde54015. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ52177532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe199faf87baa640ccf67bbe95d254de85cb48e0aeb7f8606bd86dd5f95cd7e58. 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/QZFZ42133327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a05ed852e840791cf969ac2bc1fe0bcdcd0092fe6ca0533037680b6ac67343e. 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/QZNWW2096868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a981e97d0abf97f2adcc7a729aa83cddd46a54e365c494c65cb55569186e87. 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/QZNWW2041104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdae89517a7b329f59595b959ef3d02c79d17748e82b804d65424c50036c91c. 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/QZK6N2366856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55d496f91733cbe5bda68ce84e808ff195d54d8ec2c609694e0d5437b768e1f. 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/QZK6M2343590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e1d12836bac63a55f2a80ad1c0d520550f7bdb46880736ab4c6813bf8be756. 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/QZK6M2343589.