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 0x9cfec363cde31cbdc0f882cc64e4ebae422a42da8e4837c05ffdd23e48c8bb29. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bf78785-2578-4c34-ae27-d8c7ac7becca.json and https://artists.proofprofile.net/proofs/artist/9bf78785-2578-4c34-ae27-d8c7ac7becca.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 0x17516987029579ea34fa44f7a82868a58dc3ed49717a00bfdd040c718694c2c9. 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/USA5Q1014101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd0557a330aa3c76a868c1fba5da2f8dba67c4179b2e77351d07ac1eed84da4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA5Q1014104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467e12be4ecce063cc8c85bd14e02359baf195754fb8477e8d4dee837c9536df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA5Q1014110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1445ebe0f07bdcfda9a22c1c98272c489c5a4f111bc5182eb2f2ea97b6668ec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA5Q1014112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d49b72d6795a72c1f12bbc35515be87563aa7e1148755a3d8871664c739203c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA5Q1014114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa0185a8a6c5809ca3a2cb6f6c1af0a62d3c6c9e4a9dcdd8fb121f033e57cc4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA5Q1014115.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7db1fae7b33231060c7bf553ea6ef321d10befb8ae96dee89b81fbb0c3d8649. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA5Q1014102.
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
George Washington's Favorite Cotillion / Corn Riggs Are Bonny
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd31aad6c24b1601810161987771f44b8b441e130742db7f331409cce744608. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USA5Q1014103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578bf4830656c7c1a9166f8bd96c428368f967a00b0a5ddb4d5f36634d68d49e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA5Q1014105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbab1cee083b5c162adb1f945458788adfb21456663f0e454daa7d7d276e4d9a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA5Q1014106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1cd61a435d2d9b54c9992802ce88286a0e494cea49f4c1bab51d40552b2fd. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA5Q1014109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d79c5a6725439405a6dd9d3b5b5e4729c1f7cf2f50eb83f0f108f8db1e861. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA5Q1014111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e0378f1b98a08f24b1ab4a3112caafa1f570222ad370276b54527f07b0dcd4. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USA5Q1014113.