Sebadoh () is an American indie rock band formed in 1986 in Northampton, Massachusetts, by Eric Gaffney and Lou Barlow, with multi-instrumentalist Jason Loewenstein completing the line-up in 1989. Bar
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 0x1ba8ed7d80090835852d92f1a052a384e9c9c0bda9f2cf92abd67b69ea13d69d. 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/68a2fe2a-dc9d-410a-892d-fa945b6ab5e0.json and https://artists.proofprofile.net/proofs/artist/68a2fe2a-dc9d-410a-892d-fa945b6ab5e0.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 0xfd6322048c42c3b3b9240e5e02f48f88d6bd8d9301cf31aa7825fea27ca56145. 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/GBCEL0501295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cdaeae3f8d4bb08c948d97aee8694b9146b567665e2252331fc859b64766d. 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/GBCEL0501316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4475a000d08815e71b86ff7f86380036669a09f5f3f7712f5974e3d0c77df73. 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/USSUB0742007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd314355d46be3fab0e5154ee1aa610de768958026af3c60532498d61c1a526. 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/USSUB0310867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02da59f3ab15b19bdefc4d88bf905f6df4008d1b52093601c463b5fdba09a9c3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USSUB0310868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e571539f0c05d0ac5e7bddf2260b50020a1405ae35fdae9f5eb9e6f0e549f. 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/USSUB0310869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ee70b231e7dafcd68ad89051a0ba27f622ce041f14bbf626718d1e9a6041de. 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/USSUB0310872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe51bb868560f130a4288656b346517ce17f29e3adba8e549f2a2705ded990e. 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/USSUB0310875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fc2abacdea4fdc77730bdb0b9bc8c6f641875ee0bdb6e7546768053c4fbdf9. 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/USSUB0310878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a537a51330d74d039b4de9cb19b392aba72b54b1fbc9af57c4dad940184306. 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/USSUB1194401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb425e50483e47e2ea04d5daae9edf0a33e9229d0606039d414e38e1e9d9289. 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/USSUB1194402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b4b9a175952e1ab57c75e46ebfd9e50a289ee12ca8d6e24745e50cd062070. 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/USSUB1194403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf501b9f871f5c4028ee1211323ae71d15a514ba3e28d15dffcf6027425ccd3dd. 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/USSUB1194404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13c3b8c1b588524edbde756d34200b9248016443b12bb14d2dbd505a5cee265. 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/USSUB1194405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dd3c91a930707ccc5c68227e24d7aab2e3f94c3f0bcc8064b8727cea3a3bd4. 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/USSUB1194406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf952f1f8f2657473c29f03343745110ab64d42a6351156e5fd126f5baa267ead. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSUB1194407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da1669d11dbe4361092d57288e19238033b4e1cf203c55f33c6c96f22429f8. 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/USSUB1194408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce258e059d22e01709dd2ff99c70cc239f5564260e7198d3fcb8262e725a872f. 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/USSUB1194409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c930ea9cfad4c79893aaa99bdd78d16648679c69d401f80cdb1a9b370ae06a6. 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/USSUB1194411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99deb6882a76ae6758dfe60e413ff5408c8c3e06bcb6665aed6e735f176ba624. 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/USSUB0310244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a65c76d01ed1fdae74ccf4139dbaf56211808d09ebc2778db4db89cc3134a6. 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/USSUB0310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25447fe9bdea01a3948c4cf606df92094fc29e1addd449337e17bbe96dd01ebc. 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/USSUB0310248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f1291daf499141d286ef8b7f13cc79461189a9ca7cbd5eaef43c06a5c521fe. 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/USSUB0310209.