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 0xe2bafc97bfd6b2f42f83d4643ae9d390ce72b232009187346399fe4d0c91d176. 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/30842b68-6fb2-4a73-ba52-e1eca8e1c031.json and https://artists.proofprofile.net/proofs/artist/30842b68-6fb2-4a73-ba52-e1eca8e1c031.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 0x10e7e3afbfa05245b70f08ba67b545f368a7e3ee3ccd0ff570910c254bf7eea5. 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/CH7819503903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8468db089a2ec720056d41c80bb878fc361bf5ab8ceb9485c12e171304170c3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/AEA3A2491525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614205efe54b97b11fec079d15d0e80c1349b6a5b4b980dcf219bcbe7b985bf9. 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/AEA3A2491528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21337ed4eec2d26b020e1a97146f7ea9c2c48170aa1f3c7e8b48dc9d27f80355. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA3A2491519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b9672a5fe2cec58421fe9f8f57ef82bce3442aa35c55eb65697be731f2aa52. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA3A2491564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda5da1d457f9e44749049970da14a84d2c5a183c2476d2b899f7cf1a18de94. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:36Z), 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/AEA3A2491518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25475e3f0428c20f8c4e7e75e1a5132b2234b416c8f204bc85c0d7ef2dc54e13. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA3A2498439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afc74bc8bf0a637972f52c01f8d90a60879555bbd6be7f633e947dfcacf5e3f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AEA3A2498580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b8b63b414c248280204479b61978f95dfb3fa5f590b28e226d94fd6555168b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AEA3A2498584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe118bc377ab301df2e5cee7d81a13f9dc6aeeca4c988391fed1e4aabe6b1034. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/AEA3A2498425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d51148f6bad0e3f46be7c2632618d8c02cb45d7197fc311d8966b6adc055f. 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/AEA3A2498437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8d9b2529680ef9064f3e50c677eacd03ba272d7c3540bd75d8a4efa22d131. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AEA3A2498386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2999633e88a925c9c112c4a18d8747f491731f26a9114591e0ebd69ea123fe1b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AEA3A2498380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a82a28a3c40498f0d586e693cdc56b58d768e73c250695537e774d0632612c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:10Z), 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/AEA3A2498447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e4d5f01d231445f1ddb6a3763ed52fe1c7cdbd2f4c31a49477e693b8602a0. 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/CH7819537757.