1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x807b67d80756c87df591d55469e2406701ddbcbeaf81ad29e6615068c4d543c7. 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/edc945ca-84e1-402c-a875-e35376f71b37.json and https://artists.proofprofile.net/proofs/artist/edc945ca-84e1-402c-a875-e35376f71b37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Things Get Better - Recorded at Src Studio, Ann Arbor, MI 1971
Let's Work Together - Recorded at Src Studio, Ann Arbor, MI 1971
Cool Breeze - Recorded at Src Studio, Ann Arbor, MI 1971
The First Time I Saw You Baby - Recorded at Warehouse Studios 1972
Soul Mover - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
See Saw - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Hijackin' Love - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Doctor Doctor: Leaving My Blues - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Take a Look - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Feel so Bad - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Tell the Truth: Your Love Means Everything to Me - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Heavy Makes You Happy (Sha Na Boom Boom) - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Barefootin - Recorded Live at Otis Spann Field, Ann Arbor, MI June 11, 1972
Take a Look - Recorded at Warehouse Studios 1972
Soul Mover - Recorded at Warehouse Studios 1972
Cool Breeze - Recorded at Warehouse Studios 1972
Feel so Bad - Recorded at Warehouse Studios 1972
Things Get Better - Recorded at Warehouse Studios 1972
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 → block OTSBitcoinBlock must exist at that height 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 0xd75c1d001905b3dba82d217fdbf8e0d5d689122afd5b4a285459ec3d64f853be. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:04Z), 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/QZK6F2093279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4001fc638a886f9833c6543611de2970f16d48a305d3f05713fc2d11a3c02e. 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/QZES62115207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406151f013810509e10f934bf730f2720dcbe1374e2b523cc56144c314d1c888. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ZAA6R1900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a55f09a675237cc83b0019d97bf60ebb10cb99ca3bdbefd8e245609bf79c8. 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/QZHN52139781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607898c3177653112725a48ed88eb89912e44d7232c4c50d11aaef9db4d5670. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN72181880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04b161d6e1ecf3e8b85076966137bdaeb63452b6727245306441f30fb18a1d1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2161718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5bbe899328bb3b49d66e19e60b3babe81d3046223a24f29920c75612fac6a. 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/QZMEP2188855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f815c6fe61b69faa85c0049103a41bf2667adca54cc2fd28790ac78359a633a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRX872158364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e15c3909e7cd8a252a05263cf34a1335b8cfc06f8eb0f2254fab79148260f. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:47Z), 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/FRX872158368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dadb096f2b2426c6b5fd070ad30af5c1462b9e93c056597e007afd10a26226d. 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/QZW9K2265764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142934e6b7c3c075aa5a8d35563180f36fdb4c68a9b6eccd6c618046fc0e5318. 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/QZW9M2216145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b18ae13430c6384c62dbec083550799b654c7e5503c5e0a77945ba872bd7cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9M2216147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36710a6653d61474d4f01ac2d6f775d7f2cf58ebe7fbd0edb8b365f4ceff8d05. 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/QZW9M2216149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ea0646232938b3b1fa678180896aa3f8e7a481f4f54d282caed9ceb5e66688. 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/QZNJY2364230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e21fce0b990297fdda8e5631d138c650944fd2d6521dd322c7e9f4d7c8d3197. 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/UK43Q2379827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97010421d6ac10ee63b00f9bbf4f36856a2149788c9e5f88435362091e5a3301. 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/US7VG2401858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc8c44df10cd06d89679053c0b46ffc771e26b549e7acf2b44341a95681870e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:31:51Z), 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/QZHN42423047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6664779ebb9e05a72a42cc227f0b4dfd2422186112757de1fc280e901d3729b6. 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/QZHN42423049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3b8f284c0724e091ce079e089a4282d69b6f5b402829c1d9b343ee754a6e0f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN82413793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d45a595d1ea59aba5abbbf75922a8c95b4447a5e3967615114aa42421318e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNJW2444118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb1878f4e6317405b79d0d96ec622001713cb5cd31362c3b9d256df7542ccc9. 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/QZTPX2416226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00aa9c7ec5054aa30dbb26d2c4934c8c336b18e137ece1266eb9c2b0c3316d9. 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/QZW9L2414075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb70fdb924979df210a14a72271d4bfb5b428fe53bfe25e9143addb1d391c12. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:02Z), 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/QZW9L2414077.