Sleepy Sun was an American psychedelic rock band, formed in Santa Cruz, California and now based in San Francisco. The band was composed of vocalist Bret Constantino, guitarists Matt Holliman and Evan
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 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 0x1e7085a07862d65734e66a283062745fb1cf3202f51748ebbc3ab1730b99c388. 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/aa6f4c9f-cc0f-459f-af91-1b7d94bd5f83.json and https://artists.proofprofile.net/proofs/artist/aa6f4c9f-cc0f-459f-af91-1b7d94bd5f83.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 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 0xff04afe414ee2fb967cc739f63595ca98038f8498b775f7ae5f1bbe15799b225. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCABT1442060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53de3bd3c910d3966b46b545dd55856d96b577a09c424903d99b6168c45675c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABT1442062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79458338a024e0fda1837e019e22ad0cf0594672bd224791e0be4a367c893823. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCABT1442064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ae1545ed648c14bb28aa90bbb53be557995da619a2bd2d82c93a315490d188. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCABT1442066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb179a6add7d66fe8677cfbb95c7871f8f20509996655326882f4efbb12221a7d. 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/US2421226201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d06f74dd7693d5bee445822565602810075e62d9fea27a0de9914a1466378. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US2421226207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaebea03fa9bd05b2a33fa57fbc85b9a11fa50484c2382275943ebe6f0d098a. 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/US2421226210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660ed6ee9512a847d2e577dc9cbbfe550cac841a293427868405e2c9d5dd5a04. 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/CADE70901284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2244f2a7d0e00cec3ac5dbbebdae019341a7e8be51ee2f87d1832293cf570fb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/CADE70901291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a527a8fa00bfd31ab22c20893e712a88de32ca5ee485e09a35d6a1b33f24c. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/CADE70901292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174ca7710770a8067692f7a6ccf658ece1017737ba04bc4f9e0fb2a1a0da0ae. 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/CADE71600254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d6dceecea93c53a26fae294bb1ee8b48c54ddcaf6edb44bb76c5e24a757f3. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/CADE71600253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1c4854f1168c6c3d1d3dbdd6cbf5b7a8dc52919fcb5660198a8a557b5c798f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CADE71600256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f06f6b2149281ae9ef8b3307c38018cd2dcd0a409e0d6b6d1f02c94fb58b52. 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/CADE71600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda257a61dac9e05738ee55b3cbb31d68403f916a697886df6c6c259d59ac8d6a. 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/CADE71600258.
Global Underground #41: James Lavelle Presents UNKLE SOUNDS - Naples (Sampler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acf58c3b7a5ee488b4e4443310e729ad7cb2a2652fb5d9bbaa2a5064e5299db. 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/GBPYR1000172.