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 0x45bf14d7564b0ebaa581b02dab3a573f39bd7abfd7e8bf8248b6a2acacae6fb2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa9bc1fa-533f-4b93-8ca7-db1745eb009d.json and https://artists.proofprofile.net/proofs/artist/fa9bc1fa-533f-4b93-8ca7-db1745eb009d.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 0xec10da98613e46d0207034385eb848cdb4e03bb48f0f8dbf9c49bcc1e867c8bd. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USHM91378906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713e6366853fb475e056546571a38bfc8316e5578e7be657eee6b169df4137e5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM91378888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2738046e97688a575b40541381644efe410d553daf544fa770e5c2856c163dfb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:02Z), 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/USHM91378891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982f9d925d36027f6df3d295e9fff4ef8b5a240445066472143a25b9d9a260dd. 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/USCGH1550595.
I Hate To See You Go (But Happy For The Time We Shared)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ecf626fdb8f23d0ac09d6fb6c9fa51e10c86dc135f21f5243becd8ec8ea93d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USDY41651708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e3d79c4dde83e432a88b56aeada2cf74813be3eed391533515b720c406d38. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFH42100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c184e951be33eeff5bdb69c6bd203b421b39a8af997633255b3cc26da0de303. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFH42100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbea8725127a59cc5668aff62b5a9596f054ecb77a2a6d7c4bad4d28fe2e48b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFH42100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9321f5e5884a6800fe9fc043f1352fb9460c735cb5bf04b537ca13261097fbdc. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZFH42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b2803903c1b01235d82dd906741d76479786294fe733507498e1f594fcf317. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFH42100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071729bfa25ae4fababeaebeef9101038d0f2e40d465382e15070a9b59224ed9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFH42100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68209eaad37eeed4a10da53cacc28d341d2c6ed4b538bbef08fea6925fd80db8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:51Z), 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/QZFH42100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a46ebfe19302e0a3a2148fbaca57f0049d341127836ee71ec310ca927068ea2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFH42300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf021850150ab2649b16713e14dec1edf0c5fdfb64044ef61986b701cb1fadb0c. 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/QZFH42300019.
I Ain't Got No Home In This World Anymore
Home In This World: Woody Guthrie’s Dustbowl Ballads
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b2e9d98d9e01a9f76c6f466a421cde58093d5b60e8ff97eace4cf9fa74fab. 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/USAT22103786.