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 0x2475a3174c7d9e85ef29c3e24e5175154595e6acba430b897943ffbff66d8c47. 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/bc51ebdd-a464-4463-8cee-52d6162ba9e5.json and https://artists.proofprofile.net/proofs/artist/bc51ebdd-a464-4463-8cee-52d6162ba9e5.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 0x6dc1cf6075faa65fb332161984c5e9fedc8b647ba959d79336e115676b70d5da. 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/QMBZ92052255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a6df4f871273c31b9b48de3633d1a19a80b02dd8d8dc2214c7a804371964b. 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/FR2X42153896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c246171c748254191f0d5bb0922e477c23eeff20c42f2a7996512612b40efcb. 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/FR2X42153895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3cea10e3e8db53763c5b80aa3251e9222f81442643ad220e2999d3c75a323d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR59R2262195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4765c8bccd720689a774b4ea022a3374d1edf76251daacf93ea906873e2c8b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DKRS42312003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7c7e2fabd8bed63bbc4a824d51c7355181fb8cd2eb526172e6e277029409de. 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/DKRS42312004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7253ed735e29581ca5738318736f98759d584dbf04229c5830f3c26a3132ae3c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DKRS42312005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9180e68e2a4b6d26b6fabdfec85620ce33d250f3cacc193ef54216a4e5f08e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:32Z), 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/DKRS42312007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ac9012bb2899ad2fb500a4693e4aaa1cdfce5561e4edaebc64ff2ac9d8160. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DKRS42312009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3baeb2e46d42731e6c9d5abbbc40efd4eb623c965ac4708c96e9803a0589b2. 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/DKRS42312010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7c7e2fabd8bed63bbc4a824d51c7355181fb8cd2eb526172e6e277029409de. 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/DKRS42312004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7253ed735e29581ca5738318736f98759d584dbf04229c5830f3c26a3132ae3c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DKRS42312005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ce2f872620806f9785d5082c9eff079fc10216e7f55950d9a76942330eff00. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DKRS42312008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ac9012bb2899ad2fb500a4693e4aaa1cdfce5561e4edaebc64ff2ac9d8160. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DKRS42312009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3baeb2e46d42731e6c9d5abbbc40efd4eb623c965ac4708c96e9803a0589b2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DKRS42312010.