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 0x7f7fbef2d4324052116d49c08ee4dd6af1d5657d0e980517fe2f5d1eae8afc15. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d69087ce-698d-4df2-b510-39274c4c4b14.json and https://artists.proofprofile.net/proofs/artist/d69087ce-698d-4df2-b510-39274c4c4b14.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 0xae2ec0437ee7af30133cf410e6de130f08d1569463d3f038ccfedb0f84deaf2f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES17E2100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc33ab7d3f6ed4c38c81712bb9747247d0d16ca6fb940be4c1e75d4354c8715. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES17E2100749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe01856e5574048d6a0369262907020ac35d88bfe6e82cafbc15d869fa9e40e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES17E2100750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccaa55b1ac395717c97b66808b19f1b6007a5bd427344b6385d806bee34e73. 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/ES17E2201420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d6305a48cb11131d5074d24314cf5b4e5fb6d875bdd595cdb9a6b760bd011. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72439620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6169e77ee34a4825bb005126cde0bf72968bc0ccc5a7c0dbefa70eb59546386. 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/QMDA72439422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b20f8d85938d5e184e23465eef88125f902add7f009c4b4e18461768eaa2b0f. 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/QMDA72439423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a1d9c66b450d42ca55d9bb3f91743cf9f3950e1e6b8eb3fa084e59662a2349. 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/QMDA72439424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d6305a48cb11131d5074d24314cf5b4e5fb6d875bdd595cdb9a6b760bd011. 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/QMDA72439620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056d8c76cebb36f868daafebaa17ddafd5de3c657c1ff81f46b8ee9003017ff. 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/QMDA72439426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca105d2ebfb7c0d9ea6cbd54a99be6ce9cbba9f3a09a501052d7d0115a6ecf6. 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/QMDA72439427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb9676ee82160a63c8d2138d7b62740139463cebeb4cf3d7da7536c42cb52ee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA72439428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779281d0860ff9e1af542b276d934b2adbcf7f330a0de529e0bc83451505d65e. 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/QMDA72445752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85514dc73ec66acca5c277a082c55e02044007d236997d77565365903231147f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMDA72439430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad0ede5a1e3e588bbc25508ac35eeadc308bb8d0b678402cc8a2702d69a5f3. 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/QMDA72439431.