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 0x5542eb22af9b018f6c735312e415704ba6bc5e1b874c5df8ad3285404c4e6fed. 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/23709bb7-273a-4abf-92c1-57ec77579fa2.json and https://artists.proofprofile.net/proofs/artist/23709bb7-273a-4abf-92c1-57ec77579fa2.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 0x248eedade23c247441948bc35040b8ba35b820f140599cfd93359b4ab1c07bb5. 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/USEBB1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a658543391d1a758ac5f19b49e4c102285822e69f0c72f632e23260f38e5dc5. 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/USEBB1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9700d6312eeef15119555ebbe9c97327e76d157de243c4dfb7398c9d4d438b9a. 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/USEBB1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75034e33521789d3fcbd5050ddd38ad2793784775e48b7872a118e23fabc681. 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/USEBB1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad25c32441ce81e2642849e5951f46e818ded457c002a645335a481453a1cd48. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USEBB1200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dcabb238266913d09a5d883086919e20eadf12089631bfc1b3ed69babb5b56. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USEBB1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705842c7e4108b2b89b9df195e174c03927d20cac5acc7b8ee93e80d1e8f7402. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USEBB1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e830b4deaab2d370353ca74a44f68e080eea00a1987627648551fe699f6614. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USEBB1200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6e430e858264e05b4209e69832489a03634c01f4f7e48fa5c3a84b7efd9ea. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USEBB1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a17b3916844b9c6e1d03b8551fc41bf47bd9ef2c1bdec647aae6443d98586f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:54:43Z), 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/USEBB1200002.
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 0xce63b17cf7a02fe848d85b51b62b974b28ba0972f5c055a207abea026b48899a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:02:28Z), 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/USEBB1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c42a21e9de04ba4f96cba064b579f2867ed63425a212f372cbb302ef2c46975. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USEBB1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561b599b450906c08a5eb2132ad7fac056fc49dd5f1cc6237e2c4016ff7b2f21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USEBB1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb0fbb040e17a47b6e0ae9a18307960f85ad193e58beb166fd0549248a74f04. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USEBB1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ed9ad0284e329ae178046e0b292250f43dabdc254aae31ed4aa791c1c7c9c3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USEBB1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eba0b7cfc099cedde0e067c216076a86d6a873995c24c32157bb0d563fe533. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USEBB1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcce2371e5f1b7a2aca465aeee86ed537a6e6bcc78767c443e07066e3718da9d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USEBB1200017.