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 0x99ecf4a7267f0f602486b147800a0c04ff27426b9b09145d0eef8941df6f4351. 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/b90cd21b-7ce0-4aa4-b4cc-68091b4dbd25.json and https://artists.proofprofile.net/proofs/artist/b90cd21b-7ce0-4aa4-b4cc-68091b4dbd25.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 0xedbed76abcfc45634248ed59d9b860b42d5d6f75bb71c8ad9379f79ca27dfcf2. 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/BC2PM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540290f20dd38fdf1579325b5ec2ab9f6c6666fb9e58165e436cd9084c7f60a3. 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/BC2PM2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd4f37b7fbd4ff848471e17ede7b2e09841551e02abad016c6b7a7b0ea18366. 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/BC2PM2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac38456380b465bb9b9f30834c44ac40756c1c6fa6e30df1ae77a3278b5f8ff7. 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/BC2PM2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb30949aabc9ac7c06e5c55363a511592bd3e2f90319ea6dbf03d1d5315cf715. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BC2PM2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c141b241219f498c8aeaf69659e173cddbac94c1e15b5a47228f43a354cee0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC2PM2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404cf2d470f9cc3fdec9c78685293dd3a38466dad91946609928ff93e55d8e2c. 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/BC2PM2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4b5d3a697bf3b3d6d98fe9678d1bf1a180a8f714218022c38b6b3c4dc8365. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC2PM2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca860e8f5025e5317622bd632e357bcf07598fff93cb733d344214b5f303b31. 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/BC2PM2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573131f4cdb61dcca8f3ae6ae1da066239e8a28b19378079843bde437f5faa7e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC2PM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e1e099e24b412daeae7ef704672b566e8ef0463cdefedff0c35cc57fef44b. 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/BC2PM2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa24fb4eacda022d36fcabb22cab72d881593529bcc565a19baabd73d801be8a. 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/BC2PM2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55796412c31f7c316279a2be76d9812553ff63e54e0df2ecce057a3db0fa06. 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/BC2PM2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573131f4cdb61dcca8f3ae6ae1da066239e8a28b19378079843bde437f5faa7e. 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/BC2PM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e178f0a8dfcead05869cfc056f641980718d5dc63b9a88df8bdb5dc8ca4f7d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC2PM2200002.
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