William Coulter is an American Celtic guitarist, performer, recording artist, and teacher. Since 1981 he has explored the world of traditional music as a soloist with ensembles including Isle of Skye,
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 0x3caffa0c48463a69d2ffb1523bcd96654242a5f688acaf1aa24fbc75a52b5d3e. 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/594854b3-4423-400d-ad7c-b898746bfe5b.json and https://artists.proofprofile.net/proofs/artist/594854b3-4423-400d-ad7c-b898746bfe5b.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 0x62343bd382e808e67c41a63d9b4cf30a735721361ebcc1a43f8cd0496a671ec3. 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/GBARL0300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74df2871d4befb254550fac665464d95a778780ed56072fe9d2a24a34ef3d3ba. 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/USAKS0500938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa069810805e520711d3d49962a01141c0f90d0d736d8ab820bcdcc406998e922. 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/USAKS0500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d30778c1103e2a92e522c3c5329f94cb091f33b93ac94f2aaca1a2c9021fef3. 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/USAKS0500941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4762b29929e815b789fb94743768b243c85514e3ec836b2f22eadc0c1597b342. 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/USAKS0500942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f037e736be341644bd92de9a2bc314cd575c15854290032f283f746d31ff82. 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/USAKS0500944.
Henry Mancini: Pink Guitar Acoustic Guitar Solos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fc4396ae7f0b468355e6a80c06b27a5ef5940072c609ac2b701c3eec60c217. 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/USU6V1120603.
Caoineadh Na Mara/Amen - Lament of the Sea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245aca7e2b2a48d1d9f8414f2b429873ed30965c98534c9e0f1679939f4e4036. 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/USWH19801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb1aaa4a89ea9efb609f1508a403d5bfc3e1e17b328314f5f23db7e57b939ce. 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/USWH19801103.
Guitar Recital: Tennant, Scott - Krouse, I. / York, A. / Bogdanovic, D. / Duarte, J. / Head, B. / Ruiz-Pipo, A. / Mompou, F. / Dowland, J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228fa64dfeeb143201a69d0b05dbd508403e6863f19951eda842d7af21bfb150. 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/USASX0820701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77254d701558b64236d090f17e1df66ad8c06b64858d7bbdd20fb0bc6d25135e. 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/USA5Q0312107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290bcad1cb9ce14ad01845150842f9c9191b008f665a23df4a1e7235d161f260. 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/USA5Q0312601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b80f6335cfe1c53d35d6378bbe8e18d10f41519396b319571dab72bb76e0b9. 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/USWH19801058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dbab8c05734a83dc0177d82a6f349fc198eff9d18271e6504f183decd57b6f. 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/USWH19801060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec44624d1491ec66b340f1e03dde0248e865261ef2c351f922f77d0b73e04ee. 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/USWH19800723.