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 0x6098a36776144d364e503e9f46617e9a5006c6e384a16099254a112a8549f159. 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/2b245e9d-4299-4e97-b66d-240e2ec08225.json and https://artists.proofprofile.net/proofs/artist/2b245e9d-4299-4e97-b66d-240e2ec08225.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 0xa71c7143ae08d8342b77f8e3f83b8f65dbc3ab05dd2d03eb007bbf70223dedb1. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QM6DC1525431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2143ecff09d2911377520d889a4b7f439837a3c49f3a7be425e65ecc9394fb. 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/QM6DC1525432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4848ca1e72bd5a94bed0883fc23ba2679bca07cb356ce97edd90f23f851eea84. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM6DC1525433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb636a9103a37247447cc80416de8d744c8ae2ad636ec2a85df279f52f426a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QM6DC1525435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cda16e2a93a57a36f0e8d01170097bf3f2b684b9566874d4b78364bed06faa7. 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/QM6DC1525438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a9688c8ebb204f6281c947ac7e72625ab4ce91689e549debf84ba130c102d. 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/QM6DC1525439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4f0cbe341baff4bdca5c769185553fb0c129980a07c147031d9f68dfeeec3b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM6DC1525442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7b62881fe6fd21d98123aa69ea2ee87a81ed85c58af3bc16dc1cf19ac20dfa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM6DC1525444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb8063715932c53091200178b210c443d5d99cf667150eee4b46c57f855324. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QM6DC1525446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b317ccf18c9d604db8e46ea5b89740027b7e1485ac1f659ce1cbd4729f4936b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6DC1525447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc213a9664b7f96a09f878115f8cb80510bea868fa40a480a4b39dd91904697e0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM6DC1525449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1927de4864fdfb419709f88ec52e95a9dcf0c30b02b9c417d7fd234faf80f5ff. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM6DC1525450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bb636a9103a37247447cc80416de8d744c8ae2ad636ec2a85df279f52f426a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM6DC1525435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a9688c8ebb204f6281c947ac7e72625ab4ce91689e549debf84ba130c102d. 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/QM6DC1525439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf764ce14dfd6dbaf5b4db29cbbb8b1d06efb9cd3da789bf6aa6179df540f89bf. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QM6DC1525443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb8063715932c53091200178b210c443d5d99cf667150eee4b46c57f855324. 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/QM6DC1525446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683e59ab84296288574671624ded6bac6c1939bd545f1109610d2f010a445f18. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6DC1525448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc213a9664b7f96a09f878115f8cb80510bea868fa40a480a4b39dd91904697e0. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QM6DC1525449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cb8a154ff513b5cea162e78bf7fc5c8f81dee375a877730a95be86f55c9001. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM6DC1525451.
25 Tamborazos de Arranque Con Tuba , Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4fb9e5ca7f482ce8ce37eb1b0d21fedfa60da9e1b34df9723c02eb25932b54. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/US3DF2538698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2cee7df558e0c14e1939cd126e292ea12524a3d59f89e7ea59fdd2e296e54b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US3DF2538701.