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 0x0fdc9cb93155336655f605c5f11c90101a700d72b0801c8248e00ba30e0e5a39. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91264025-174c-46d7-a4fb-abf5b6c78b71.json and https://artists.proofprofile.net/proofs/artist/91264025-174c-46d7-a4fb-abf5b6c78b71.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 0xe3bd8b31628c45891c5b9d4988a3e5e430fdb4d8f89b48c0b7a1699612ddad34. 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/USUM72007305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bd8b31628c45891c5b9d4988a3e5e430fdb4d8f89b48c0b7a1699612ddad34. 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/USUM72007305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607a52921dba57e0f23e560128244c640a954136be4f0a57e4e5633249a0ce7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUM72305993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607a52921dba57e0f23e560128244c640a954136be4f0a57e4e5633249a0ce7. 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/USUM72305993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8818f9f6edc12d3fe0cf092faeff8dae9b572dafce063fc0dda0f885e822aa. 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/USUM72305995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f633ddf5bcbb1b2dd23ee7de9e6998a1c83daeba0f4a5079ae511fff88ccb4. 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/USUM72305996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c309e40db99da65029c935fcf09b6d240b8e98fa50b83ba381440cedc6fd87. 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/USUM72305994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6a95b8099e334c7d9be7f799fdd6f562fa6f13269068f6a44f906a79320e2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:16Z), 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/USUM72300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9780a35b564597fc2afc4574d72a18f1a63f64813af0e1eeb1499ee28f032223. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:41:59Z), 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/QZZEB2422069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27056626db989176b5170ef7c1ef04b33280b1ee8e3522ad1b99ba096c699c06. 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/GBWUL2519971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a5d369986e3e43728c35f49d1df1ac51a312c2248cb492c187b845f443245. 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/USWB11701710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9365ca93dd8536630c78a70b6060470f09a2a7b9cb40d68d3eebf8752fa63a5a. 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/AUKZM1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a62b97d2e684661042fb32d6a6353f8b22a7df130903862724d6ab192a5346. 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/QZHN62455594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a5d369986e3e43728c35f49d1df1ac51a312c2248cb492c187b845f443245. 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/USWB11701710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a5d369986e3e43728c35f49d1df1ac51a312c2248cb492c187b845f443245. 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/USWB11701710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19840d4077006b12cbc59cc57211c51fee30595cfb1ff69593dbc3dcbca6445d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ93L2020204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a5d369986e3e43728c35f49d1df1ac51a312c2248cb492c187b845f443245. 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/USWB11701710.