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 0xeddbbde6e6f99093c598025367741b2662b10bfd00f0db56baa02e73d3d617eb. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/365975ae-6e54-4e45-aae7-514897e9a880.json and https://artists.proofprofile.net/proofs/artist/365975ae-6e54-4e45-aae7-514897e9a880.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 0x6d3328053c7ba09f3f2db562bb8d5e018b8c11dc75f966ec4fea8d7b9b9a491e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/PL44R2287178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b92d4d2649ff28a4fe8f40bf8432462c4b62e947ce3663fdac610ff3f7ae2c. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/PL44R2287179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdb49e0f1061ecfacbeab30f1569363362721fb8f125c4ab7ab55152085dd79. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PL44R2287180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5815675701dc2528fb5216d0e12b9332a2e3b5fab4facb1bf6b4ce9c6cae9d4a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/PL44R2287181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbe1d1ed7398fa60d3059d7727ec8a20a0b02ffa67a82f8ada18c41b83f2180. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PL44R2287182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a0ce3f2676e16b9b77f4350116f1cec9da0b16e00017d223fcd3b7eb5b262. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL44R2287183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba38dacbf22193ee3375416469b3126ea89aff2d85bd6a54176a9e1213fc459. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL44R2287184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80daa5709f2f369827463139719467f70620d2e049a006848cbad328bfb657f7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PL44R2287185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36a3d23b66fcbb5094e25313e1618183f8918025504fb48dcdd1d92488cd2c8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PL44R2287186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c89fa475f80b8bd42dccb579d7db0fb1735c30bfbcf4ace76b1b889df4c55c8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PL44R2287187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1eb1092840e3d0b81fe59a99e7b421c16f478497073edf17875476b74fca4a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/PL44R2287188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f714b239dbd1991040c1c275f614a26d59a9b35e2908f74eca03a1ca3d827. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PL44R2287189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6340d0a0d4d7d70b00ef93cfe56d44cb80ff5eebfeecc07225d6ea9e43f0456. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/PL44R2287190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839cbd2ac974def74cecc55ffc767617b7214f1a44022df038c0f46c97260e53. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/PL52J2239376.
Double the Daily Dose (Nu Jazz Chill Beats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf3dc7b70ee341fb66dc9e10f5bb25c16cbfbbfdc636c8013134daa8012afc. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/PL52J2239378.
Soft & Smooth Music for Relaxation & Dinner Party