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 0x80e7ca9aa554f2cd8cce7fedb2b5fa95bdb27cb4700f2d7c26b8e522d8765824. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2af624aa-32a0-4a35-9656-dc6e152c656c.json and https://artists.proofprofile.net/proofs/artist/2af624aa-32a0-4a35-9656-dc6e152c656c.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 0xe38d6a8bb82e83ad1d951d16518ea22dbbaef76377a865faedd4c6176db29dc2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ISZ981300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cdc802471ac9fe57a181ff48d3825a32acca1c646fa5f021f22985e9b0350f. 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/ISZ981300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217e55aa498221716a2e1efbf657208e4a08287cad96f7d018a635b90e502bea. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ISA111403401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc96559973e3e69c8f0c2642fd86ccc143f4648bfcf81635e93d355a939e52c7. 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/ISA111403406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d2e6ff81abe3e534e524d3110b0c97e2c8247f172e6a9fdabe1a34dd901ca8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ISA111403408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cc76fb4e3492d7d17454a6be786fff5b9e2fe6206a4d01e092ae8ae71e7bb7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ISB111801701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd366bd78ab30c2102c2ce9addcecb130b64d0d7a8db6f6d1ecb8866c373e3296. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ISV441842302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3d61305a550576f42290c69637faf088f4a15aa9f67f0c15dd53068eede3f. 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/ISV441842303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9e048abd4bbc31f38c6348a8e61888e96d2af2f147f218084b380800d32ab3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ISB111802501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52672dcd677882cb6b990a2e402882d2963b0987ff7c4cbeb784cbede9b53c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ISV441842305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba91e61ff5a8ab05a3d5dda0a76bb2e71c416eb8231660297e341e667bad33. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/ISV441842307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2a7abded8f657860b70591eca39be0f1fc3c3aa396dc9c4172d1851246a1a9. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ISV441842308.
Have Yourself A Merry Little Christmas (feat. GÓSKAR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ff7796934a999c303d44801ef29bff44379371cfe1927da1c2c6d06287639f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ISV442324301.