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 0xe7233fb91fdf31e260df5ba295d464b3b42c004cd40522d692260cba94ee1983. 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/466b0f70-04e7-40c0-84fb-af2bb7ecf6ae.json and https://artists.proofprofile.net/proofs/artist/466b0f70-04e7-40c0-84fb-af2bb7ecf6ae.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 0x9b2b58242e22136ac22841a0c0b289425c726d64883101476111cd035ee8fd83. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:31Z), 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/SE6A92066013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f10a3f3c32be99485de0fe6b99bbbce98ec2a8499b0784c236bca91156327b. 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/SE5BU2168128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa815dfbc8dee4809b7598b0267ec3435f11db29dcb2622c362976da2fa50720c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5752152869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbad61c639513bec055cd2498dab53e427fc2b806beae263ace67e590d311b. 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/ATR981236754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9357488645fe3a52bf6f4622363fb74eadbcb161d00fd065d11f010da0b7c3. 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/ATR981236756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9d57d25a45742b876cc58608c54ae16ba6b155231981fedde975fcb5385f72. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ATR981227810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37cd312967d569b0db349084842451f2000949e64dd6347616ccf0cb06b559. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE5752312547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3a5b224b8685c5434e32f8426bf6ab741b27d744265598d1923e968102660c. 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/SE6TI2370729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2e1bea896575e15cc109c5928002c7cbc3f7caa229722fe0badafd6177dd6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE6I32489599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdec11026ff1744dae92274e0620d33a393aac386354e77da29c22bb1a09b27. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE5BU2478341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe316c852e490e684dc40f0dabcc9587d2b0c4f6765afd3141ac935bb722d1c62. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:55:07Z), 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/SE6HN2492033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00de0963df4647ffe546ce92b7afbd0b166f4a7d0f251cc5d48c6c926ce6ea77. 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/SE6I32463060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc1974783f989b56023586dbacca959099c04c98df50eb09970d8da388dc3d. 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/SE6SA2422457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8169390a6870a595bdd4dd046e26ee99c7c770edb39f68dae83a400f796e85fe. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:43:49Z), 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/SE5BU2559984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35f1f4cfa3c847b829003d71ba804a742c71f5f22698f410e1336709bd8cec2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE6XY2530842.