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 0xc895949728f79d54b54a6d27a9a0972ba1f3fab278d1d68b20bd1db660716939. 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/96a739a8-bf8e-4cf6-8f70-19bdc0386e3b.json and https://artists.proofprofile.net/proofs/artist/96a739a8-bf8e-4cf6-8f70-19bdc0386e3b.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 0x0c570a5fc589e6157688ae0648963e5edc09ca3855f647a38c98bffb0bb08efe. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR6V81846491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed29d48faef686e7f95dbbcf28ca8b31f20accf5c2d972faaa959ba29451037. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V81846495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b703e3b40cc422e3bf2e2d9251493be535d9ce4ce41fde6c35dcaf498f3a7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V82416888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf1a2611a463776e872ae3a33f811abd1bc2263932797cd70ff9411c1d03a2. 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/FR10S1460355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b0292d3898601b3b02efd1071eaf18beacfe0059e483939f1b4cad67e4e35d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR10S1460356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610e23d819238ab562eabd2e9dc4e28a2fd1669d0e0337794b9a4b10723c62dd. 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/FR10S1460357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eff8c24ba3e1151e075fdaed67febb927385db8b14ee6e77790a98831c34a8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR10S1460359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359950e70760dd72f78c68e9b370cc89d2f98178a0d1550496789950d20dafbc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR10S1460363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa718af84bdab2e0cca275e8701ab502dfe7a6817bea4aee84cd784e666169f60. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR10S1460364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eebeceddfbc7cd02b0919f151d4d87b63d1ea2ad09e117e5d250996a99292f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR10S1460365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a4afdc05950d47840f6cf1b3f913847bd6a6b74d4215afcfab037ac958c57. 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/FR10S1460370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd805f8327316fcd523f210d491675d79f8821b16d36ca83f26d62e4b56469c79. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/FR10S1460372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6146bfe4628670fc2fab02bc1b1c9b7c5a0d2b4ecd069d23cfec6b77121a35aa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX991511371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf949a6dd8c3f43a2755fbc27579eeb4066423de171a84ec5547c4911caa9d3eb. 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/FRX991511372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656fc317a3f3d38bdbd46b0c32579df97784af1a3dd93902221981b14a9516b9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX991511373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6d63602c0fecabb407efbbb9955f4b19846520e6dbd4c6146549bb47375968. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX991511375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a821730128a7207a040d4c0c2fcc90286986c2cdd48ab4c14f27a40ae4d020. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USL4Q2182889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cce0bba8bf322fbaf0c41398a37e8996da73ebcb1e2c71e45c65531e995b01d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITEF62200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73914dc331c9278af851bc3762495b1d2a5129db65ef187b33c635c4ce8c0275. 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/ITEF62200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df3679b584e8ec457c2bb0289d50342fa96843121588949c63338ff770d03f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/ITEF62400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcdaefb2591cd1578489bd420020e620883e282f5c7e551f3b832cb0b3b029a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITEF62400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94738f5084524fc356325ca9edf8e19ade28b2c349147dd038d3c8f6ce2d03b. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ITEF62500016.