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 0xe444cc861416eb8fdbcbc7265048a3f21a243368bc57f774f5d6b1b6b2514d3e. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5adf0215-80ab-4ff4-a3e4-c125a8bd49bd.json and https://artists.proofprofile.net/proofs/artist/5adf0215-80ab-4ff4-a3e4-c125a8bd49bd.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 0x2f25648a26776dfc9ba9fddab044e65e10737fbe3bb41d3bff6671f1df4bec2d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:32Z), 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/GBLFP2395927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bce179568c480a00a9174892ea0085652051f152973000c1c577976ba1da7b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBLFP2395928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ca326e2a9c397ca527ebe19ff4116ee790d74b5355326b9960720d16fdbd84. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBLFP2395929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70c583fcffdb1cda88ddfd5d77b882c6a6f32c24dada07123b5ea415fbec919. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:08Z), 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/GBLFP2395930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f243f40308ed387fa7260fc33401e22b7c3118aace3e1c805a9828f2185a56. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:48Z), 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/GBLFP2395931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b43225aef9d53c687dadf8dfd08cb2de7327fca2a881646fa3db27796cb7cc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBLFP2395936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf725daeea391a930b0e13cb36e292654007df26a25624c3bcc420367296c00eb. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:57Z), 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/GBLFP2395933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984c33b5a74f6abcd54e92e1e13dce0f6972e7a680e00283798f71e40128ce1b. 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/GBLFP2395934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d43a0432111fe01d64f488ac889ea7930d9f8117204297f5391d1df42be26. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP2395935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cf4f309ac2ef92e510d39fbd27dad22e085c1628573e2c07b4bfadbb639d30. 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/GBLFP2395937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd2b2a52262d6b684b9a636dbe2e0a0cbad31e8b0b54bd32a1c9080d729106a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXF9Q2580711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fcc63ec45b27257615bf1e5a42867d49e0dfa0ec9653319e71dea020c906bb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2580712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071bc5f2a91bda3605a82ac67c40a3e674649838cf46e4906f4c4cf04eb14a23. 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/GXF9Q2580713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e83f8f10be04fb47dc828f935330d22a609eab561fc364c3d996a5722cfc516. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GXF9Q2580714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5faf790e214a20b4f3774a422a44b770369d1d0847c7d1b366d46d7614c0fa8. 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/GXF9Q2580715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47ed2453566af69640b1bdad5634f46eb82eddbd07ad694d2ab8b05291a402. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXF9Q2580716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fbae14a468a5a73e8dfda5bb45eca756f730ce655a3ad2d4af8090ef2c59d3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GXF9Q2580717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d12dfd3a8da778db1e2fc6618b72e713cb0e388423c7d1f06a627be2f0abf4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXF9Q2580718.