Douglas Wayne Sahm (November 6, 1941 – November 18, 1999) was an American musician, singer-songwriter, and multi-instrumentalist from San Antonio, Texas. He is regarded as a key Tex-Mex music and Tex
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 0x6057616aafa3fa25225b7ec4c3b3700ae06d71f59edc30fe14a2322f03d5f0e4. 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/e20df779-1e9d-495a-91d4-dbb0c013c9d8.json and https://artists.proofprofile.net/proofs/artist/e20df779-1e9d-495a-91d4-dbb0c013c9d8.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 0xfe2a711ca1cf4baccbec1403d1572e08e622a420313343f1b7c503a930726306. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:20:29Z), 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/USCW62469201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63011085c601cddb2607db335707f0e4c0aacbb55071e786ecce8ed46921a895. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USAT20201982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb4b06a05bad115c38c44124e5de8e0772ec398d9e7dd0eb49e06cad41bc43. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USAT20201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5260628bc9fc9f758242d99e1a3bb7743f6a63f73ac6cff1c8b02815062b5c3a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAT20201970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce588b377ad252a574cb37f380757a36b9fd1ee89ecadd6835b873a0d8dbb3d9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USAT20201971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec31ae588db8fcd8096c59310ffbbb62132dc1baf1c30e68c99e1a14244dc43. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USAT20302663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d122224d0b47f545247ba80671d1bc8273edccf949428449bd862d2f9f6cd4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USAT20302664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f907180f9e38023b72410166f03319c6ccbbed5a13bcc436ae2157d2bf41f47. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USAT20302665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033221185dfa777514f8cb4db7280bd733b03a707795ef9b026af447ac780ebc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USAT20302666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4212e488b6134b3f9435217b2980278dae0f70917ae061c57e073a12f58ee. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:35Z), 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/USAT20302667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574a0247b15e18903408deb61df09d3af18fcf4642fc329c8d2bede427000fc3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USAT20201974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796a2bd6d2bf2b8a23a6e54343705136e12568661b0fc442883390af69aebf0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USIR20400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f9664b2ada1f23ed465dfe5cf3ab84fa074bd05dcf1370ef1abbb5406f7825. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USWB19902867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b9daa70e6700469ce0640dcf4c4c19f5b01fa8f647ef9b5f40d1145badf511. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USWB19902868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86026c9a8568bd7a2b29dcfb3471f502fde87da16dbf8f1e5afc1fff908c664. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USWB19902869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e88d3e544a199821828858249e8f0559413e488a291a63fc7af2409019086. 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/USWB19902870.
Best Of Douglas Sahm & Sir Douglas Quintet (1968 - 1975)
The Best Of Doug Sahm & The Sir Douglas Quintet (1968 - 1975)
Juke Box Music / The Last Real Texas Blues Band
The Last Real Texas Blues Band LIVE - In Stockholm
The Last Real Texas Blues Band (Live In Stockholm)
San Antonio Rock: The Harlem Recordings, 1957-1961
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08674e6b086e2da55a824890561c6a87d1689b95b4de576188f236a07ebeefb6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USHM21004763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ac146c1923ff21547d6a3d8feac9ae7eea4a72ba55076302b22494b0ccf2c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM21004766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f2eff1079db0a43debba70e3e911cf3c1f8b4943d5defead1919b5c618a57. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM21004770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47450dda001928623b508eca17a8087b4a14fffd7ae680c89d7e45ecad69957. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM21004773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f5c164408e474513854953c4f7be994d7f6df34cd46795cffd5e6fbfaf3ed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US27Q0761331.
Doug Sahm: He's About a Groover, Vol. 1 (An Essential Collection)
Doug Sahm: He's About a Groover, Vol. 2 (An Essential Collection)
The Last Real Texas Blues Band - Live in Stockholm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf597160d56709cfdf4199eba9b155a9d5283efdaf7577561cc372700933d70ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US33C0406104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d249f5aa7570d298d099cb8ec014b39c842acee2d9bda0def220e6c4daad3ea. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:23:30Z), 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/US33C0406106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87d5574becf9e7f383e5066df0f8e42a79263129e7272f798bbdfc91d81162b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:56:33Z), 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/US33C0406120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c3fae4b9de599668a36ffe62a2cb1d40694da15ae06294a9693211dda0e1a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US33C0406132.
Masters Of The Last Century: Best of Doug Sahm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9d60b365434282930842904de97c0241e45cc4993bc15ffc27ab48109b7e4f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEKB71222452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739044cc141b495e20ac3978b90af478f287e56b5ab5d68c89a8c74f78d88aa2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:58Z), 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/DEKB71222478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb94ddeba20550adee69e9ea0a5a9dc5044e0884da6f09d29f6565ea1a69082. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:44Z), 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/USBT21605465.
Good Singin' Good Playin': An Introduction to Doug Sahm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19322d37683ebb3c1c1c549e4d3f09d5946a62298fa11837d57001f97c9d1c5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:17:20Z), 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/USBT21607040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ec7098e1ce472d36a4ae6094aaeb73001d80577b5d6438f5bdf3f557ca8486. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USBT21607051.
Texas Rain: The Texas Hill Country Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0bb16e9f3b56685fdde070f44fdb80183125095c76f6398e4a5287d254973. 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/USFP70708902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5491552d1f67b32d8b671df963db5e641a05cc221e7a5f3785cecf2835138bdf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USFP70708908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2f13895f7b322586db2c4b93612a812a94ca6d14db7739d468c9c723a07b88. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USFP70708910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6e802a03afcc0352fb94a4cd3a4e2a83df699d7e8628f371f3f4329e32dbe. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USSE90930877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd425eb6352d78f877be0d36f42114bb01ea468dba2f3357706ebe8f5cfbd9b26. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSE90930882.