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 0x0a1482a465ce05e3afe8dcd3c732c96b29f5919c8eeb90af08ca8dc01329452d. 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/f10be0e4-895d-4600-a8e7-c7652a01262e.json and https://artists.proofprofile.net/proofs/artist/f10be0e4-895d-4600-a8e7-c7652a01262e.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 0x65e6ae8d9c19a28a3ad328386e2ffe1012f1ca1a25956a513fdd0037435a5013. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA42585254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c0cb05a7a3cae564c483da930c5564df586dd85aae47ad73bc08218a0a6cb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA42585255.
C'te Tourne-là, c'est pour l'amour de Laurier !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f2c8f957bbe1d0992aa779138fd16695f42605a517a2cc7eb4622832741296. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA42585256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f029dd1b4478d3f21910a7b3e899c578ce6e118e3129c3ae7671d6b06d0097. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZDA42585257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb82725e839770a5339e0afcdc812f796d983c11db038ac7caf83609cb3789ab. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42585258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9609715bb9787772251c079242d22449fe29fe12c9181d58b7a3343b6213d8f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZDA42585259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeecfcee60980798152b7c32ea2f1a06c026c06f6836035596d25cb4c2e3b8aa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZDA42585260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8935534cdffc68688be99ade586021d5e70d69dd8b4ac05f8ea08b8e959db81. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA42585261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8434e8c9ff9c74fe8e3a6c5297e298a5d401fe6e9fed9d04b42f7cfcc4da9d9e. 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/QZDA42585262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98db9cb3b34315f739aecccbc4752db1a76833f596087019301b70f66f7da542. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA42585263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd03c696ec7f2e5387e3284d49da53796fd03e938a81404e1585a56789387e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZDA42585264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f110391b1758089bd52151bbcab6ba2417ae1c846174791f3ec26166fcb17. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZDA42585265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f7301a06bc43e383913f307ff8011d4a2cdb525f02f5a6058fa7ac0c9154b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA42585266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b88bfffa744de8af4e6b78233211f0e97c0fe2ee1c49f3f0da5496d07fd7f26. 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/QZDA42585267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746a418242878d2d060e8a610b58b53bd7b55e71fb0d4638b23687c42e24887d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZDA42585268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20ab8fae612a43a467dfbb4394ed51288154cbc731710eab5c63a1d018dfadb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZDA42585269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5b2c8bca1a893f8aef2c8e1c2f65c301bd787c4a52bae1dd7b09749dcf5723. 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/QZDA42585270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b80509dba77fe025909d2c4d5fdd6b2c410473f55cc47ecb52dce9aa927d3. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZDA42585271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936bbbd8e12eacae6da3778f117e3fb1d11f6da2cc020ab75385a77715308ed. 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/QZDA42585273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b009348520fb87b6379f1709d0935f52735347a10544960d2dd0ed8af48f8d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZDA42585275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef54dcb2c8607f85236538be9ccabcb8b51fa713936cbf00d9df6f684787b8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA42585278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57598c77d8b4abe9472ae7f82f3c93ec091c1550496f09af6ee2923e3195c063. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHN92503855.