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 0xfb7918d001e0fd66dc7074d885935df5932b880891bca6ebd1e7eef9765c8837. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f684db-859b-4d09-a2e6-7f4f4a724cca.json and https://artists.proofprofile.net/proofs/artist/f4f684db-859b-4d09-a2e6-7f4f4a724cca.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 0x4d589e4ea9631e7d18f4d88b0326fc5eef591742eb58d4297dd962a7cf02774d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA62567042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe087285adafa39c4f58a8b1362e30f5a0b625fd0249715605c5a5219de2812f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:24:16Z), 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/QZDA62567043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e161d7f8eb12617789482cb2b1674f6e646068343403e4426617fe3354fa012. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:32Z), 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/QZDA62567044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3694ba2776781e8573fff3054049dbd09859c67b088804f22fbc6df7188c83f. 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/QZDA62567045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1064330a4d67548fe76be5e7fd9db8b4c6f6322f02f2c2d75f1d38279fa6aa41. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:50:22Z), 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/QZDA62567046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1d8546776bd41125620e400ab78ef3c45ef30f49a53432a80c3a0c79d147da. 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/QZDA62567047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e0e980c9ae93c6c98d0233ce0086c80ae4081748aa809be6f342e868b202c. 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/QZDA62567049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5702d26de6ffa59b08006739bdc36d3b6b357691750f46b6f5935bf4cf2d1ba. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZDA62567051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca426a934b7e5be5dbc9466c10d925873ee44fa36412101f93b79368c27d9d3. 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/QZDA62567053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bfce9db3c534697cba191c81eb0498023d5df5b111d794950b5eb14d494410. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZDA62567056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc5f55bc19564f0284ad6b037791df8ef1606ca10ceee6377dd472ea5cb3811. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:01Z), 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/QZDA62567057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7e6eb393733c8e59857686b725662edd07bfd75d8aad96fb44fd4e5bcefc1a. 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/QZDA62567058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22aaedf634d67e3f21b25a11c99d631c6136494519b6a6951b46583d3373a9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:47:08Z), 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/QZDA62567059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7576bcf8138a87e32464250fb595ae422423e3530beeb367cb635ed747a6d4. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:09:10Z), 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/QZDA62567060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5ed404a64d99a7c501d5a88e64e49aaae0cb09310f9aa774150e2d457cc016. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:05:48Z), 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/QZDA62567061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d36a8e766cce85f7fb210b5280d9c05ae039fa1b730c9bed2e92f79750ea7. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:39:20Z), 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/QZDA62567062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3edfc0665d6d5bc30599247c48e9e099d83bcf180f5f25bcac5bf6beffedfd6. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:17:50Z), 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/QZDA62567063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c09e45a84239f5525674b499b441f5ded0900efb39a50b876d14dbfeef036c. 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/QZDA62567066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0259bd30398c5d95c075cd43167757689cc70d94e9ec13aa676c18fe5bea905a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:43:30Z), 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/QZDA62567067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e8986dfe51dd8ddf9964718ccdec3ed99aae7cd3d0d2920c5d46667238080. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:20:01Z), 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/QZDA72571200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904de77638a4c65a0f1e6bf70344604339b2d72a43a7e9f72d573d4c3b455482. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA62567064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe672db723f28abd10fddb255f9025abcc0558003b58db06a3db5b754687ecebd. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZDA72571201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beba784818835d4fed03f68927e2afd4e7d0ea3ed5a1a67c774fce036e759fd. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZDA72571202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f50635161e24dada394a4d56d2c9ce015d046b78eaf67cc0b31f27f621439ab. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:27Z), 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/QZDA72571206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5702d26de6ffa59b08006739bdc36d3b6b357691750f46b6f5935bf4cf2d1ba. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZDA62567051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5ed404a64d99a7c501d5a88e64e49aaae0cb09310f9aa774150e2d457cc016. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:57Z), 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/QZDA62567061.