thumb|right|Steve Cropper of The Blues Brothers band at Hamar Music Festival 2007, in Hamar, Hedmark, Norway The Mar-Keys, formed in 1958, were an American studio session band for Stax Records, in Mem
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 0x0ff03b6275d5d2966b53be7141066e6541ff33cf8e81df935fa5f78bc3c61026. 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/baa7ac52-38c1-479e-93e8-ef5d38cdbea9.json and https://artists.proofprofile.net/proofs/artist/baa7ac52-38c1-479e-93e8-ef5d38cdbea9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live at the Monterey International Pop Festival
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 0x86401242087e939029a1cdd21b7507ef62ac5607c64b4fbe45d327a746cb56e5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW1949587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145cdc6df6dbbf7624ce0992123e72bc555d933c9f1d848d5bb1bc24624d5f59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TW1949588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4322a6f94d35e09c1faced7836f6ee2f9fbd35ea5e3c9e51e7b0cad229f036. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW1949589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0ba01531f428fb4ec49531005b11b915f7c25461067d657e654a738a66b29a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW1949590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644c0d42f20d53a6fc2957b818a09803dbd637dce70f5ae117ff3ede758c829. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW1949591.
I've Been Loving You Too Long (To Stop Now)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa317b7508ba8efd7ca60b22281c3579b8c99bc97bee166743135e94964a3e73a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW1949592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03f709d0763d0dbffcfb056704a2644c0e30cfe54fc7e496c50b885181577de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TW1949593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dcf23d14f20cf6ac2639003ce2e1bf5dac0a6507ea412831ab2eacd65347e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW1949594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6ffb470828d8eda007213093daa719b6a712e3ce69d0fbd67561ac7e17ae0c. 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/USAT20001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb1a3d656e2e060176de54722b639e365733c3b8c74b663e9436b2fc04920c. 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/USAT20003768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449972f18f8ae54fe63956a5899f79217b800e133b6a15b0870f95a3b0fdd30d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USAT21205806.
The Complete Stax / Volt Soul Singles, Vol. 2: 1968-1971
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c48921fdee6a40187695f0226e91a515441d840684d7115329a9170edd2e4a. 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/USFI86900582.
Stax-Volt: The Complete Singles 1959-1968
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6ffb470828d8eda007213093daa719b6a712e3ce69d0fbd67561ac7e17ae0c. 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/USAT20001001.
Lifestyle2 - Bar Jazz Vol 1 (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511e6a4b8e292bf38295850d1164715a3dc63c2ca6b1d76275293ef5d4f1cbec. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USFI80200249.
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 0x51bbc9402e23b7af1266d8cbe0c55d4881bfc07aefe61512d6de50e24aadaf06. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USAT20003731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bae1ab9edeafc6a42edd193cf3397cb08d2a643e24085e572396ec9b08ef76. 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/USAT20003733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7513eaef1d95ffc235ddcfa47fcd6a235898aff2a047baf7629fa7f0778b500d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USAT20003736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6697b1b8e8e86a4b354329ed20441d13707ae0bdf45ef0915f89f7c9bef7934. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USAT20003743.