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 0xd6bb7e5e534dacfd417ddba7420ab0f48886aba75a4ce29e187a7d2b07fbe393. 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/3d808547-0e85-4762-8fde-dc6bea3a4d71.json and https://artists.proofprofile.net/proofs/artist/3d808547-0e85-4762-8fde-dc6bea3a4d71.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 0x00c98f1c2b89fa8cda86564d5cecdcb0b4bae89f9411c3d6f21ae20a441b37eb. 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/USA2P0610147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd84ee9c0eef637b6a201ec70f02e08c74e69fa16c41cd2983afef87fb21c41. 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/USA2P0610166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9894c75e37a91fff79d37d8c5a47928ab94413b909096732e67bbd995f9e5cc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P0610167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a306fbcd349e64852f617fbcbf023f33d11882231774ce15ca6eafe321c294. 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/USA2P0610168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079dcb62d89aefd0cc621579e91f64735223ec0b767ac581e2205a146e6d012. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2P0610169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463600b558bebb85afb8c2bde2d83abc1ec668514e2558915ad948eea1e27189. 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/USA2P0610152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eff201c6e30bfd1b3a305800c3f362be4542b6fddc1a60bbd0fac3f7e203b6. 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/USA2P0610153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3cc471f06f584828a80b12e971b592193058b7aaa7bdaffcea605ab21c313. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USA2P0610171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b464f114bb0850f58db51e5438dce3dc22687a2cede33cbc4e80c4106a0f03. 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/USA2P0610156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f61638337676acc4ff2affd0b4f62e1992fcb960440797aebf2e409e2384506. 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/USA2P0610174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb6fbb0deaa0451401cd1a899e3e9b1688403ca7271b4a6d839bc15ece7630c. 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/USA2P0610157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28150f075623473c6e0b6fe648bf321a264cec17e1cc84fc76705155cc978d26. 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/USA2P0610175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c351a180aea2059fdc9a282e82b908d81bf30d293d02621d871bfb13c99cd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA2P0610160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ec8d27fcf73ddd37deba463c12a7dbace3950220eff5de053c845da33cccb. 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/USA2P0610179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf2f9c35fe49d0b24430a6536a837c7a5a7d3a558a87a7a10c1a0f67b9495f3. 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/USA2P0610183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795cda6651640371fdf973818cba013899cd5aea23268324fb0ea01688c37965. 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/USUYG1050992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f8af73601cd86a7fee8ebe4bac605218c3d7bf169bd91fbbc3d1a91f24949. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USUYG1009468.