Isaac Lee Hayes Jr. (August 20, 1942 – August 10, 2008) was an American singer, songwriter, composer, and actor. He was one of the creative forces behind the Southern soul music label Stax Records in
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 0xf126437fadaf63cb97646248281a1483d636a4f644b27732b12da487f4d977c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73296f08-409a-472f-85d5-ea7dc9b1c1a9.json and https://artists.proofprofile.net/proofs/artist/73296f08-409a-472f-85d5-ea7dc9b1c1a9.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 0x3a445b194a5373e34c378e3c5afb1096df662db6a80a6e76ed47228329b1dfde. 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/USC4R1605495.
FIP, Vol. 3 : La playlist qui rythme votre vie (La sélection musicale de FIP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8cb31cf98ab479f3207a1a30f5d391c65155535d6b5e42dd5769ea4e2ddc5. 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/USFI87400005.
Theme From "Shaft" - Remastered 1991 Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b973b0cd2c34ac85b8542fba45a1403020d2c3658e38671f8d10c07db6c5c0. 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/USFI87100103.
Hyperbolicsyllablecsesquedalymistic - Album - Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c9ca3ba4be3c0237c94382931136014373f1befef47c725b4291d7b0f5e940. 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/USC4R0919621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438a46e02ac0cfd738a3a5530361f472f04fdcbced9096cdc4f22264ec13b604. 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/USC4R0920520.
Walk On By - Remastered 1991 Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113682b1b5e3a577e3f9674393f69206dbce1d59c57f631b0470e1e1f19703cc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USFI86900034.
The Look Of Love - Remastered 1991 Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287c45fb947d29b36217fc658847d203bc508b9583d3eb5b6b8c018470c6099. 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/USFI87100101.
The Best Of Disco Funk (Disco Nights Vol.2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e846707526ea0f8b4ccfbcbda0d76dc87e0d9f5c1b8f2bad03c85e4e06bb651. 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/USPR37907142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864aab551490b0645c2e29bc5049c00fd907b3a7d640c3bbd4cd7b3bfe433a58. 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/USWR39000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b257505fef7ded834e9a8fdc4b7815bf86ed2b94666181a687a08922de74395. 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/USCMG0301876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf40edb57afe1e6682dd50499527b5ae9632c902011b3569437913c06656a75. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBAJC0900560.
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 0xe8ef887a8b7ae1aa506a99f2b317b3997c97bef4b0baf3d8643b2374d135b956. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USUM70608463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb27fce1a3ae9d93808d9a6b5c916e46d9c7c8429abfb43582ac678ceb972bc7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USWR30100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8074609c0c01e6ec2f86b1d35d92575c6cdc294bc2e39fa6a03724163a1a7127. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USFI87100050.