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 0xadd6c0e4c1442114811e8d192a8f81270cbd1d939df362a84cb4e205738df549. 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/af092807-4b1d-4af5-8db4-8b2b467aa7f5.json and https://artists.proofprofile.net/proofs/artist/af092807-4b1d-4af5-8db4-8b2b467aa7f5.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 0x311136cfaa169cac93489088da4f27f59ebdabf66c507b9c7c139125c4087b9a. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR96X1902470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaeff63e4337e84ce5c2a7e880eb8407ded3a4d2ce4e3f688fb1c96be12c94c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FR96X1902471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b195891fb4efe0af99c09c62730ca611ea18dcad06da24940d4f24b0e7e1b. 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/FRX282004498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2918165b16e71bbe38b865b3bdf4110205afc722668734ae62954dcaf992fcb9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR96X1902533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adaa6486d3f66d60dfecb4fd789405ec6dc78b0055cdfb09265c3ee2c4678e3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR96X1938345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b171b11e94c55a9cf0f707a516412ac7efd0366c40ce574495258a917d67998. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR2X42068087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4c82f1f0aec211446b22472b6cd985636c82c881bfe0b8f78c2abe10d0dcb3. 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/FR59R2051088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1155f9b4fe6022f3bbc61293df0ae4de4a54b427dde542fb1d70ee159a8f49. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRX202009910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f46a8b94b9a61cb02654b02bfd07c21a6708b205c5c019133ae32fa77251a. 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/DGA062045744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af40b72867372d52273c258a14fba6833aaf63fb61d1388c47f3a6b5b67b075. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/DGA062045745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb686dc925ec4d091a73fc851db2d24112f1950f4df5ee51556d8e9ac503a745. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DGA062045746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53095e498bc2c3aa5d9a2b797441c469831913b447ba32c42268623e7d8db35. 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/DGA062045747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5486c2f7ecd278bb3e47bba7277671d3399f8f40e54c119e7ac946392f3d145. 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/DGA062045748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b372f7a6835a069240234f205a200f632e05cb4579098b29f8569405d8dedb. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DGA062045749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e6f68d4409deccdbb4b18a7c95237f78a23712bed2d0c3a81964d92a2a90da. 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/DGA062045750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2081330d566c5cecf1f33762d7654dc96494699761c67eb45ac91ff5c8d24d95. 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/DGA062045751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a2e4eef66a363dc6c207a6f68cb7e907abe824eb68e5f06d956ce6ebf3c50. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA062045752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0d4f98e3f0f23ffb1d96ac27185f5ef4bf8e14f31e5a13b8a3ec3cc3872671. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DGA062045753.