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 0xcdd0a38ee4468e5ac5c1526ba20874324dd0d7528fce88a3d76e3bd62ac1948c. 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/ea1e595f-90ed-44e4-9a8d-8722c8eb3e5d.json and https://artists.proofprofile.net/proofs/artist/ea1e595f-90ed-44e4-9a8d-8722c8eb3e5d.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 0x2c9d6150907d970d04413f099400a49153717cd203e35c239c48cde48ba9e189. 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/TCAHL2383605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb03f6fe1e776ba692293e3b36e9f81569269909bc69cf69627ad3abc435ca9. 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/TCAHL2383606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219049ed0d68c5e3e2faf5206e3372a1b2a523971d3126c2104ef6a51c4c17f1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAHL2383610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd150b4a3d7490b7e421fc47869466ea7c2618dda26a9228c82e28f3d835527. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHL2383625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3116a16034ea9961b2aebc3a81dadab0a8724e0c219fbadacb35bf07c2206b. 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/TCAHL2383632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b937b17ccfcd3b5de138655969ff192aecd67279a0270ea1a32070c41125415. 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/TCAHL2383640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eddc5f6cb23deed363339898e14923cac07db6a267661639b7da7b30b12500. 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/TCAHL2383652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74e6dc12077b393aba16f825abaafaba21c0a74601722fad6998d5fbff572d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHM2338863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a84665e4533c4d15d2e2956359943ee34206c5d8ab77db51f0ce60c99af367. 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/TCAHY2425742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4cdbd19905a744fc6d8259ebc0063c0c5987f2019bf7b5f6cd91a8525124c4. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAHZ2429675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930b8a931687fd32e3bf0652dd14ab42ab26f87f8e30f710ea2a29ee3a1f2bbc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHZ2429724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1080a6b1a9334789cce11b15800ef819e96e19de48fb8fdc8a38f512e81aa82. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAHZ2429804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb476e83acf99b10bf69da7fef63b70cc0f5472d11d306945dde2bdec0f048775. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAHZ2429829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4157212454abf00c9ce893bf1531841d720b8b337751c4ba9338e52d168681cb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAHZ2429865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ece2e469e271ac12771b711d1d31a5b3271eecb7cdb440db2de5146731dd508. 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/TCAHZ2429886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05f267cc1e74f2197289cc177f428906b4e7614fd22b39927839b19d274190f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAIE2489429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f2c2ebfb61ccb6285538da8058e1faedfd283c08daea9e7db8fc3e01e8ef2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/TCAIP2403268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90deddd7963de2c6b572acd76f274f203941237ea31a93025e23d2e4b5bd06b5. 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/TCAIS2491251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182808a56f63231a6a0343a00f527650c6b235cb519c37e16dad81ce439377c0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIR2491419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a4871102246ec7c08c4a763caa1a6e681f2b812c4d7278aa955f673f3c4308. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TCAIS2426583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3451a983e090b1a90e30ee7a8136cce5898272efdfaa555f27c69c9977f382c2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIS2461207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70e33691f25886d97b85da53478264927dc2c916a770ab4d9cdcda6e7ebc62c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJC2437337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228e95ec71c4332afc6c10d82e12b21053df50e2f9c3f8e3e4da96ae861b6562. 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/TCAJD2450130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c270c022e709104a66c4cff538e0c5024b01dfe339bd0d6cb84a34f3fd2ad0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJR2533731.