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 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 0x20aa5e5d330955f60d275d1989f39143e43224d9604043edfbab0f54169b7532. 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/5bb3a1eb-ccc2-43d5-9088-7f78b636c7b9.json and https://artists.proofprofile.net/proofs/artist/5bb3a1eb-ccc2-43d5-9088-7f78b636c7b9.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 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 0x709df010f0588dc555e4a9472c7444e6cc795ccd72dc1672c78f94d1fd97f182. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AUVYV2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448481b10323e4949cd8022b2dfc1846aac1bc39780206176eecdeedefd40ce1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUVYV2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6e1ba50c1ef964b3532d20ab4ae6f5ac9c7f11ee21528796e896d0f0a641c. 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/GBEWA2202415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081e4a3e737fe72821a52b75cdbb274feaa6b7b5796a0d5a52b1948cc8c3ad68. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBEWA2202417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e29edc4c7e3c7aa547c7244627267050261c16d0d7ee3dafa5b4c97604608c4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBEWA1903340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556e2ce4143b4f0f18c39ab0d3de5bce92fc0e9124d5a8099bf05e84119b8a6. 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/GBEWA1906576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cd3a27e9c2966056838e7327e74996f080c9ad8bad5d357334205ce792a66. 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/GBEWA1902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77f6e3d4ae2c2cc66c404dbdf4b1eb9ecfb4a3c631d5d6598e65d2dbf371584. 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/GBEWA2205690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e303f92962e64376ee24efaa2e41e9c6a506f9dc413c46bf33477fee60eb7b. 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/GBEWA2205691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8861c46370d641882e9f77f646705c47c62cfaa7101728f59763281e027f2b8. 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/GBEWA2204470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689510c9a6304a94285e42e415d854129394b90fce57fdb42388cf679c1f18d1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEWA2204471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5303b259ea89aae75f9b4242fe83883b91b853a86eccb40210cc573a1e88c4f7. 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/GBEWA2105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d40798fc27f9c65498a65220144f95291cea599065f4500b2b4d321313eb0. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBEWA1904830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cd3a27e9c2966056838e7327e74996f080c9ad8bad5d357334205ce792a66. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBEWA1902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3056a7063c8a99518be53baab2924e82f7a6dd519c1b42822dc0575760392b4. 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/GBEWA1904831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231cd3a27e9c2966056838e7327e74996f080c9ad8bad5d357334205ce792a66. 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/GBEWA1902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e29edc4c7e3c7aa547c7244627267050261c16d0d7ee3dafa5b4c97604608c4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBEWA1903340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d311271dd4e045deec2441bf32a99cdc0ee10fa9691a4368fc9bc279d91b48f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEWA2300960.