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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60269a0dd8faa7d18c6c99866a4800d1ea685c88395914c53c475bf5882819d. 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/9e8ef23c-308d-4bae-96d1-a87a42c6c4a9.json and https://artists.proofprofile.net/proofs/artist/9e8ef23c-308d-4bae-96d1-a87a42c6c4a9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfdb1932ca64b059f83fcb8b9ea0691725eaf9d4aaf19f857f8d2dea6d03cc0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKM2L2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca912b35afe85c4dfceb622b2f6b359cd45e130d8b23d8d1baef54867d142921. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX4X42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2811bb82e9c6d1a4f85adab958b4abc983e3144b08316b0c8aee23694cc614. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX6Y62200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963a9211d6c2f11df7f05e7e7f9db05e5d0a2cb9594fd02323640cd8d30d03b5. 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/BX7P32300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d32809728c77a4735579471a4914377bd13f6a506138400e15de6d17cc81033. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRWMB2200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc741a3ead6e8cf46b5e30562c10ff036e50156dd1d0f194bbba1b8f1447293. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX32F2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159dcfee61b5700a267aacd85501cbfd3dfd66af67d519fa930a1437b6ec11af. 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/BCM9A2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc80920ea941616d378e5bf92cd1f2a7c3d1652d129579740626e1cf28af0822. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB2000713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a1c2f86b736288200316ed6b30972b7b39a547a8915b366a4a028b6be4aa4c. 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/BRSME2200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa1f3cc0f79fa3420f1eadbed282af1b7d2c2e0d6cf6e0f894ad10a40314469. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCM9A2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4406583139c478d623d38b7d109d9feb68c4cb5f2375cc0527901852deb47f8. 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/BKBSS2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe0f840fed6d341a9cea7f9a3f66dd4126441f15d6b420e5cba9f0719626e9. 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/BCM9A2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e4ae454a18733bb59eb2125beff2b31d5ee4307a46dd4b57a7388d79e8b246. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2300569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13355eca782f624878d4cccea15d9c90e31524c8ee25e0a847f429e6ec591ecc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCM9A2300097.