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 0x5d2ac3d8c2ca145dc79267af8bc71a9e736823ac6d1b903f556d0d3001f89b88. 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/ea094a49-ab22-47ca-a0ed-f2a001bd405d.json and https://artists.proofprofile.net/proofs/artist/ea094a49-ab22-47ca-a0ed-f2a001bd405d.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 0xd3f42e9def2db470f449c45e786c8e7c4ebbe76efe81da2688dd41a2d4064c8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ42059101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a598573fe08df58b90989542f0032ba30364e7b9e18850637652e0719f807fc. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZHZ42059102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b72edf9ff79ec98174347d82349f8101da6d6c27b00d476b83bd11bf92b3ee. 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/QZHZ42059104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc0eba456a77fa924e76a277c183e7fe47f00194d138b6b57f14e3304d1bc0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHZ42059108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649cd0b1442e8ef89e5f26c750f8f0afced16dde986d175f4151277fcff253f5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHZ32103346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07755b5ef35327035535a976c4706504a0f685e01b6f97e3f5496d88ce8e0e2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJW2192349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e200e8cb730528853c5735ea257f9d23968cdd442bece6b3a6514320c46d58. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNJY2284688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12ed74f755eea15da8973332a1a144dbbfb9b704db77fd3f93b84e626467832. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/US7VG2343314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d95e84305827caeb86555d3ed6f9b3758ef360e8ff38d07804e8cfa032945f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZ5AB2343169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5e0334d4d3fbc853e58095b5fc1a3badda49f2a9454ff6da947099a4821a5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZGLS2376623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450afc62d0534bc7d3c69b7683694d8f59f746f8a745d9bf3a586c9d617f73b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMZ92374315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8f6cf2e59393fabb92694a2089ec81dfc02c96f5b9a061322c927495063315. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZWV32320763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b694b9503abd68228a9b9d1bfa3759f9b0cc6c2ab9e2be2b51185be7b9e995. 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/QZZEB2314686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacdecfb4cc4d25661ed854c310ea1acddaeb2ab08cf384519b74ba53d0ad35e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZ5FN2405359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a7e5f984fb3767a06a7c9dd4d66a44b03436ee964d1b78b45cf653e9b2b9b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5FN2488766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30698dcded532ddfda7ca843ff25534135872d919831912ea3f1597afb01f1af. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USLZJ2440561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8305d5c9839184ce8c899f9fc51dc1f16ebe925ba0bc37eb93a6894a79113ef2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZWV32412658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d556a1bcba2b1571c88b2ed8cb64023c9e7cf87c66a01e728ecc238bbe9cb4f. 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/QZWV32463574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe563b7695b76278d9fd2da834fba7d0697968ecaa69448e2b64b99e3e0377b86. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ8A2421117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd7b7059f7e483abc13b4ab351b672b47e29b1d349c8b00201a5d2f1dd8dd7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZZ8B2410671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45139c6cc5a251501b4cf14a0591c67475cfbdc3304891aa7f4cfb1717194f3. 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/QZZEC2415749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e4b17e9956022cc5d1c600ceb74d348291782e2cc5f661039fadf9470082a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ5FN2505149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba5906a4e0447a47bb64f6ff1135e381042d41f7a77bdc141bb4e81b1d55b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBWUL2505479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44288526046d59499a82c8c37bda2dada9ac236ac84e8e58a238981ba1d28c67. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTRX2568870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a6bb1bc0aa0875e4fcc6de93dc6184fc203076b8c65c9bc77339b98716317b. 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/QZWDD2523588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d839adc8c2bb8be701193172ed143e6c264b5c2c146d4760bf36e4394ddbb2d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWDE2555501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c07496bfd1461aa70f68ea70055f01fa49192febba742ca9b8867253adfd2. 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/QZWV32535500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288eb6968935106fe3f6a1131be15e23706e01a529cd35774c24c3e301f47652. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNJZ2528100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ecfa9e2c0fd40bfd6751672446a6b6b1d061d4e3a0df95ad1375f3eac9344. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ8A2564709.