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 0x920b6469b585f252bee70f84406762b022fa265cfde03ea3c258c6bb089b5db1. 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/98f3c7b2-e554-4129-946d-4685a06b3f4e.json and https://artists.proofprofile.net/proofs/artist/98f3c7b2-e554-4129-946d-4685a06b3f4e.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 0x8534bd84b03a436a48da75672f0fe56b660cb08f61810c4bd4ff97f0389666c2. 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/USHM21544727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609dfafa6912715c15973ea3be19436610d2d80d983eea36f8075140fd26a1ee. 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/USHM21544732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7738b6143168d5418acac588264a78b093f1bb75358f4a818255042aa7707. 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/USHM21544741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b67de972283a3db197f53d115715efcc1fff86b8d1be36655abfb1b01a274. 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/USCGJ1656430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d183b9279bc8a4ace26f314a402f2d9d83cdceb1f50477f381fdd68ed01342. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USCGJ1656435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17e2cf73d52964864451691ad217b40e85328bc998088aa92eb9870d42c00c. 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/USCGJ1656454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dca0147e295f33a1e312c440d1a99a26158775ba61fdc4246767e0493e364a. 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/USHM91636371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07121d5c40119fcb2514b58b392d4101465dec4f61a5b50cdf48f267f0d7fdea. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM91636386.
Slap Bass Groove (Backing Track for Drums)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bf25bfb24ec2935c90cafabefc46f5365d6e87d0666bc6d00e623cf4f9bcf7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGJ1706808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866ec73a713fc58da45816d13b9d154b18c827347db10ebb69f41c478dd934e3. 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/USL4R1821319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3650aa329b12cdf874996da306fc202d4202c1cd5f7fa28e316b1c9bae81ed. 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/USL4R1821320.
Upbeat Indie Disco Drumless Backing Tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7845fea3b80c7002c372217d6d853c14fd42a5c2a1558ddc2c97676b66ffcb2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6P2121889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c911ab7e612fb8a96a4405bb8f7df6633776db3b3f17b32804b4978310ee739. 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/QZNWT2076033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c99173d0451f53d05b1c85ab0262d328bbc4575e070d4f479032fe5f91cce4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ52115178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc663ccea0f3317782d5f06e171bdd0718acdc344859a060b6b4d500b52cbf. 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/QZDA42107518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138abec2ceb06fbe9c5318996b7fc6f199dffd7e5e8c90e0b85e16222059d9a. 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/QZFZ42177423.