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 0x1995267f89ba7a6f8cc7a85bdfa2b95863c8634a927bdd0f0816ed04691d86f5. 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/d07b2760-e003-417f-886d-2ee4f754fd06.json and https://artists.proofprofile.net/proofs/artist/d07b2760-e003-417f-886d-2ee4f754fd06.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 0x23bd8e312da258be58386dae3bb47f879dd44edf9ae238cd6897e70ebab5bd41. 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/DKQ4A1410401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ca384872d41c306eda2a5f3795cbde12afb18045e171d2225085818be8058. 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/DKQP51101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b21ee1e4af07065616dd9c4f2d1d91a14664c88bed4d392a32d87ed2e1e3b4b. 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/DKQP51101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea27dcd4065a8bda253ad04322242c7f9bfbdcfc270f1c1fd6d8d7582bdf5e. 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/DKQP51101210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9389f24ad0dfbe0ac71d7f22e49b8f288976a522286f915d205805824b3cf7b0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DKQP51101201.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049aca830b3143031a7f5a145398d42a73c5389088f504512cfe443a15e49eb2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DKQP51101207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae76f082d6fcda18e826268116443ec1dd3f986505f723f37065a4cebc97b3. 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/DKLC50900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eada6ca8cb5db8e2ba5db3726f4abe97aeb5f7bb15d8e77566c6e51bb6f1fd. 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/DKLC50900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7f823a9c7e3d1261a3f454121cc81f7f3a34127c59f4e08dfb0c04e678e2f. 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/DKLC50900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe859ad40e1c2d9640c7380c0abd549b66ac2b9788aacba2ff7d787656b2213. 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/DKLC50900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7376e15f3f3c4525bbe270f9b27420334d6ecc006c9a378f80125251ae7e42b. 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/DKLC50900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f00252f9d95dd10781b50e4b064af45a917c416baed988b1479a7abb14603. 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/DKLC50900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e756af8dd047b87ebbef49a2f21a36a60efea2bc9e39e9a83aa822b2910a7b1. 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/DKLC50900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be55bec872ca4b2fc65b82a946cb8fae260d5837153e8c217e7d535ba17ca4. 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/DKLC50900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbb7d03e588ca69b1834fca2f2dc722487584996a042c1927f4b798ba03bba5. 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/DKLC50900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c4f3f07669beb2ee85c3840df57292f210efdc00cb6590e7e014c49a9d2c0f. 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/DKLC50900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc37d5f08dbc81f8383ecea2835dacc7c7d9cbbd0c774376403ff882d90dc1f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKLC50900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670839a813b42cb2135f163ed1b52053b7aa12150b9ab52bb391daf2cc484d82. 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/DKQ4A1716503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11416151bb5c6f0e1c96a756353c4ee9901c55ed0620ac113a6ddae05ea42fec. 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/DKQ3D0900504.