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 0x34680f0018f788300a794634b5cd63d69515c9268d248af0c87d07b80fa639ac. 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/718f6f5c-b380-49d8-bb26-cde6b1f2aba7.json and https://artists.proofprofile.net/proofs/artist/718f6f5c-b380-49d8-bb26-cde6b1f2aba7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Darn That Dream (with Axel Stordahl & His Orchestra)
The Complete Columbia Singles, Volume 3 (1950)
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 0x8279cf63baac1c6f56d743e3a9f36e8b01dee774258ebe705982d3b62ade5ce4. 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/USSM15000126.
Tea for Two (with Axel Stordahl & His Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dccc2b9ca754efa3d36718d178c8bbd311c5239d9ec380e3e4178d8e7d20c3. 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/USSM10000412.
Let's Take an Old-Fashioned Walk - Version 1
The Complete Columbia Singles, Volume 2 (1948-49)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41af99b16e55d72b9930a9ec7c509189a76092b0ff684a653f3833299efab01. 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/USSM14900018.
Let's Take an Old-Fashioned Walk - Version 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c02939842142ab277ec646591b9d943e33f3c55edfe83167e67353cc131311. 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/USSM12303992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41af99b16e55d72b9930a9ec7c509189a76092b0ff684a653f3833299efab01. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USSM14900018.
People Will Say We're in Love (with Axel Stordahl & His Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc648cd8b092bcb248493c433616155f9f8125143e3283ffff68ecd28834277a. 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/USSM10000436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dccc2b9ca754efa3d36718d178c8bbd311c5239d9ec380e3e4178d8e7d20c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM10000412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dccc2b9ca754efa3d36718d178c8bbd311c5239d9ec380e3e4178d8e7d20c3. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USSM10000412.
The Golden Age of Light Music: Highly Strung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53748e44bdd9569845c61a6a1dccdcc0a3ed1bc33aa2bb99389a823480661a5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CH6631056626.
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
I Can't Get Over A Boy Like You (Loving A Girl Like Me) (with Axel Stordahl & His Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e38592abd72e0aab969a60621cb969e6c923d2cae75f5ef4fbbf488c3f0a7a. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USSM12306162.
I Only Have Eyes For You (with Axel Stordahl & His Orchestra) - Version 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24672f0d39183f14928bd96f841715fa25a40e9360429b5baca39ecfc6ad35d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USSM15000180.