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 0x0c594cdc813310a6833f0a41dcd40055e44897f499ede37d8fcbc4ed8c996f21. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c02ef02-03d9-4899-b8e9-965e3b8cfb2b.json and https://artists.proofprofile.net/proofs/artist/4c02ef02-03d9-4899-b8e9-965e3b8cfb2b.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 0xc854b1af6bee10fc9372c6da9e3bbd72866c8cf3b58ca5b6dbc1068f4c139bf9. 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/ESA082050512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25b8ff8fed3c7466ceee6b6a2cf2e892ec93bc9ff0dbd03a77eb3abe32547b. 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/ESA082050513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb8c4519e65bbfbb5782aada870d2de99089133eecdb2556e8e9df758ee9a4. 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/ESA082050514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb346ac8715393557075cabfabbe710b4074864f58b9652990e5fc82c252b5f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA082050515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081df31d662a69c1ddd0fb7eb89f67c790c386ae4ff5be8d646fe1df0b06f8f7. 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/ESA082050516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb781ea215deba8585711a89a686b5b47aa960f8fc8e6d11a2ef3ce715fd9c71. 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/ESA082050517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8513702732846a2703a4892950575b1fd877a2790acdfe770093e34242cec71. 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/ESA082050518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e062be5abd845757e8ef5a855f5d7d531012def0e867caffb5bd9467e8bd24. 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/ESA082001356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc844b1fbbcc05e325c148ae77d75741f7930ce298f8780a40537c8d58fe1c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ESA082050520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1e889dec869e44a008ff9b8f9671f8662047798987155bcd9e55c5fb7f6a92. 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/ESA082050521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63d430a676183cbd86a1342aee48e04822dc993c520bd156c90bf15f834c8db. 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/ES5592300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6388b11b49b610ec9f41e5441927ccba8bc30ae991d2c792baf5d3d6a5133e. 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/ESA082100472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e062be5abd845757e8ef5a855f5d7d531012def0e867caffb5bd9467e8bd24. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA082001356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a958652d602f4977e89a82cbda5008007608c425e21afa7e0d05ed727046f0. 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/ESA082205634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4fa04226c9cb90d71d853ed24ecb5b578d700d9a385d6fcdbe5b36e0c12092. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA082205450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ffeb2c0cbedce3feea55e82d8b1c0f70db4b786755e974050c2cc912384e2f. 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/ESA082205636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23dcec414ac96e55c0b38537e0d323f81337a28f3dd3548e0644ecd2ec4db9d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:46Z), 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/ESA082205637.