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 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 0x78955dd9dbf61d283cfb10fc93070bdb03a951bf963f10cecb870541bec5d355. 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/d5b52b0f-f014-4945-bbd4-7fd8f4901f96.json and https://artists.proofprofile.net/proofs/artist/d5b52b0f-f014-4945-bbd4-7fd8f4901f96.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 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 0x58ac3b358315c2e7679c61effdc611e4dfc8549285678e611ddb653b5113647c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPI101700584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fe8d6aa1f679f807e52090380bf63c7a6e4c68f7f010da808f06fe5bcfa36. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPI101901793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e41b09da6463028b95fa134913788b0456dce4d57f9761eff9ac7af2b8904e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPI101901794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c5c2f366d12ab72f5681dc4f24e0919ff495bd9c99ca132569093f25f67e6f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/JPI101901795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c889014f0c12abf1313a245e3c5ef3cc8436651a9b675c8f3d6e1924b0c9f3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPI102101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec96076b12d035fe42cb8103aded604fb62025baacbc5a1c6d0f6fda49b347. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPI102101059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214e73eff8615bcfe4aa4e7c5738f6ef14cb6d72890b3cd2138a354f4be85e99. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPI101600836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88bb5109d8ab774a06a27ebdc7699009d91ae2a24a015b1bb93aadf29a30f5b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPI101600837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d09c3c1516a5fb890b56b91146033164c653165893e37a183dee8da4ef95e78. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI101700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41224ed97e94432e9ded6296fc996b88c0965dccf3f9de3f4249f2ddfa5c33d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI101700583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac3b358315c2e7679c61effdc611e4dfc8549285678e611ddb653b5113647c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/JPI101700584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9731607eea4c5f5eb6c76743e68895d73a92fd4b9bfcff24385fd897fe23a669. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPI102101061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fe8d6aa1f679f807e52090380bf63c7a6e4c68f7f010da808f06fe5bcfa36. 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/JPI101901793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c889014f0c12abf1313a245e3c5ef3cc8436651a9b675c8f3d6e1924b0c9f3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPI102101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec96076b12d035fe42cb8103aded604fb62025baacbc5a1c6d0f6fda49b347. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPI102101059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214e73eff8615bcfe4aa4e7c5738f6ef14cb6d72890b3cd2138a354f4be85e99. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/JPI101600836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88bb5109d8ab774a06a27ebdc7699009d91ae2a24a015b1bb93aadf29a30f5b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI101600837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d09c3c1516a5fb890b56b91146033164c653165893e37a183dee8da4ef95e78. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPI101700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41224ed97e94432e9ded6296fc996b88c0965dccf3f9de3f4249f2ddfa5c33d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPI101700583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac3b358315c2e7679c61effdc611e4dfc8549285678e611ddb653b5113647c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPI101700584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9731607eea4c5f5eb6c76743e68895d73a92fd4b9bfcff24385fd897fe23a669. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPI102101061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79fe8d6aa1f679f807e52090380bf63c7a6e4c68f7f010da808f06fe5bcfa36. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPI101901793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6477d8e5f3f6072f8e2e873f8f1df6b7cf69a1fd7438189862e95d44a89ae. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPI101801594.