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 0x76be5ca44229cb7b21394d9e8f06fd92876ad9717ff5627584ac779252682fc9. 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/c3188f31-73e9-423a-9b69-8faf45ed0489.json and https://artists.proofprofile.net/proofs/artist/c3188f31-73e9-423a-9b69-8faf45ed0489.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 0x3d72b859525ba42c3ede860daf23ec70fcadb05584f993001be81259c0616c34. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU5245911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c2632baeb4a15c0bae4fc43adc8555b458343c8b49f595db57873fbc220bb6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBSMU4848195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c739cdd78c163c03f0dc82d60c492368d5379cc95384db2ada8b84b42bebee3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU7798743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67803a6d0b595e9752149ff1ac7cfbcc0bc47096daa285c299e90c053fe84e. 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/GBSMU7856442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32024c775955939e77c7bf8cda452a25ec57244aea82a3499e609e5491bbb1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU7798790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70f70440dfa38274cd6da88fd2e69378a487b1d88168451cb194578121e071. 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/GBSMU7798794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5038d0230c7612e0fa727ee25c0c09d29fac729c43cabd85a012ce542d6e7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSMU7798738.
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 0x95fe742d21e833b4565859ce7c42f5cb038673c88ca372d2b2f9c171e398fd57. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBSMU7798807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3fc6781741677d4f268b33f419cca3a526d8f7bfdb6150b536d106df4d6f48. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX38U2160030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afcbe6333265e4ee20d44512198ab060acb3b4c1996135473f43689f362e627. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GX38U2160055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5e8e3b73f117ea55872cdb1c40212dedf2947f22cb4b0a806ab5ea60bf6ef5. 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/GX4R52117193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf605fb65e06f887d04ee56e80242bb5227abeacacff1f4c521308f58b8944aa. 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/GX4R52117195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb77317ec312582c3c6d043fd8bd601d12fe828f141b3c01b307bcdc1f37966. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX4R52117235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093c02f9c5848aa6c8893a534b4a682591e5740ae8f12fd95f0cc4babb1e81c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX4R52162670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead070b05e5598d75d8fec5142545bac492676929b62f7787b902b2bc078ffa. 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/GX4R52162704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb2f867f11a90d2f5bc6ba2108f386808f2d719897b969a7bff3eb0bf6ffe5. 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/GX4R52162706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7a0842fb1f50809141d4351bf118579b89246c9f66a37d50f5ffeba50d01c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX4R52162800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb74dde87bdfbe2ae9e61e0aaddbec9ec70fd4f267393404f756172120a4b2c. 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/GX5MX2292357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15a714f626b53eaf0263a8bb15f686d07cae1178dc9ea554d72409fdb0a63a5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX5MX2292581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80b65c781c0cd6f232b45f75a49aa47118aa233dff55e8170d78f8aef3f135. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:43Z), 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/GX38U2448151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f29c8369b293c7563b230eba0713271591f730f1271f9a5822b530f0d71612. 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/GXBDS2453490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372394f78a2c3c29a14d1f35d81d47560dbadf15233c186baf669c1cdc423fc7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GX89G2534701.