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 0xda6c7c682dddf0ad2a47acb2e56742412b7f39546f8fbf7e478f433ebdd9a76f. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7f762ee-3591-4b59-8c2b-bc1ff2396d81.json and https://artists.proofprofile.net/proofs/artist/e7f762ee-3591-4b59-8c2b-bc1ff2396d81.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 0x399d954e74e81d126b5637fa6b197b49813ac430e6ee5beea3834c379b9b37d5. 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/FIL3L1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfbc991e20c42101b25d338eede97a92346ffae5e494128402792eacb17e922. 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/FISR62100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58c170871df3646ec8d79b051c6f09f14c6e85316f47d7c5052332bdc316901. 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/FISR62100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920f59023941b0db772159e8bcc96d552aef4d591c1f716df1dce194caac6bb2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FISR62100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94629da7793e82b3b813ca244b06073ccc878bb67f31ece5f203cf1d52794b7a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FISR62100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7651770d08eae5077fc950bf2a34f1cbbda099b1bcb45378635f21db083ecbe. 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/FISR62100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce68e8f72ea91713dd9142f0db633d5a15465dc23da51bc22c8a666a7968a64c. 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/FISR62100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06371d8031f4f66f11c9083c6965bf2b77d2d9910ba3d9a0f953732fc0b22231. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:15:44Z), 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/FISR62100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f4c115e3017bbc7fe1c8c9bb9dd192b50114d5960015fcaaf421e878601a5. 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/FI9PF2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09582a2ab327b8ee38ae5b7dcc1e44caf338697baa9680d5df27cc50802a18. 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/FI9PF2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b55d68e6afb1a0a912812551cff69140438c433c76926606075f3a62002226. 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/FI9PF2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f4c115e3017bbc7fe1c8c9bb9dd192b50114d5960015fcaaf421e878601a5. 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/FI9PF2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa765cef3b702f3d893a4270829f484beb3fdf96f68696c262e46cb130854cdab. 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/FI9PF2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fccc1fc4aca1e587e5d05680e48122b51de241b0520e006b72fd51a245baa1. 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/FI9PF2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf21f19849f0bf2883a4fa046db15cda7d1e2028aeb47519caa6bdc56fdcfa1. 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/FI9PF2400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82cbbc2e33d666ecf26ac612891c2ee61474073d34a682c9ac4e181cef19f7a. 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/FI9PF2500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252c3ca249f4fa7a2012d650baae7d1a8828251fe1e54cf279ee22bf3ef3599e. 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/FI9PF2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e12724e9efebf922ed81f1da0adae4f82273df9d3ee61a327033d44506620. 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/FI9PF2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4ca354a74a300664764a3fec850ed8f066c90a67a93886ed7a8ec83a634348. 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/FI9PF2500044.