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 0xd9ecafaa2eb84b13cbbeecfd820a559e35cdff5cf91e71d97cc7fbdfc03c57d2. 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/92d6c4f4-612d-4572-878b-c90660cd56f0.json and https://artists.proofprofile.net/proofs/artist/92d6c4f4-612d-4572-878b-c90660cd56f0.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 0x40c9c72ffe650cbc0d77df5ac5119e063d1a2d3a07a706a0f89944f654e710ea. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/DEA609100178.
Die schönsten Weihnachtslieder auf der Panflöte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90a9577d833101287de14d0fa4655cbd9d10b97402c5b806a63a74e7f07f2d. 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/DEA609800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc217e37b9cf06a49aa632a410b856c5cda01b73d81ba974eb37a4cbc48c9d57. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/DEA609800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd195d933ad5b860021157aacece038c0136b0b7cd2f69be856f54e5c6a4d9df8. 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/DEA609800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad210f0e94364e692d8ed1a626d7d23f939b992a6c1e008eac1eea4a494cc7. 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/DEA609800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157ce179292ec34d31dc35121e9a245c60a99783d534b20cbff1f24658a158b. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEUM70602832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b3119714a749353f7fa7f8c94127348721b3e877dccf40a9b025b8df1e0543. 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/DEUM70602835.
Old Folks At Home/Westering Home/Down By The Riverside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4bc76c7cc17264ec2fd57ee59ce6d2af6cd739eade8bf60128b27bf4103c4. 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/DEA660400485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d51789d09cbb35c0789cd97d5d70c68868e10e8798d8fce65bdbfc3ddb1825. 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/DEA660400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd47added2ac7baaf9bc79742587bd17567f79a3f2f3ef35d17bf8b64fec6eb. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USJE62101041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9412bf63924df68e3a56535eaeae493e2c4e04be81dda1a7623d777f1fa51. 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/DEA609500016.
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
Home On The Range; Red River Valley; Comin' Round The Mountain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172edd1b7e4956c53b53105255403aeeab6907cd7a7e9943c31c1efd7b6932f5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEA660400480.
Carmela / Our Cabana Song / Hawaiian Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204511fe99161af902b06946fbd72eedd0b5054326513f06426641df670e7bd6. 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/DEA660400487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ebdc88a4b99ff2bc121bde63634033ed29b2a53177b55087a5c23d570454c0. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USJE62101039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5098ab1e13be56cb5343b59659ae77b87c63411273327317fe46a55eab093. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USJE62101040.