thumb|Sjoerd Hofstra: Boys returning from their initiation in the Poro. Panguma, Sierra Leone, 1936 The Poro, or Purrah or Purroh, is a men's secret society in Sierra Leone, Liberia, Guinea, and the I
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 0x4146f96c49e757f1dc550949b9ccb2787a1479826329d5f97b8a17323a5c390e. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6931389-850e-4e05-841a-feef42708ba5.json and https://artists.proofprofile.net/proofs/artist/b6931389-850e-4e05-841a-feef42708ba5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
if not now, then never but i'll never forget you
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 0x08a5e88eee990598550fff951eea9aa6f81e47cd78c9da88eebcd71627e748fb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZVEM1823105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f80653cce977d033429085daee2d757d8ea0c54359ecc4af63ff6ab6f21fd8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2506308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1057ec31b4d0ec7217aac93bea243bef7621db1967fcf83eca390c783db6675. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2506309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb39d6101d0e33c686015f4c45a7fa626c1d9ec85a535f787d250c3395d42ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2506310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc475b668386d669686597cd2206e79abda42965497bfca118abbc96c33c7e048. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAU2506311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0143a0d62d31a955f0b5b2f01eb390bb8df37ecb541fb2e37f07d3335ec9d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2506312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada670f4e72a1a32f57822fa3a78f04cf707f1a3e99f75f26bcd67c5d81d737. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAU2506313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c5a19304d2a5cca304fc6d304c86259c94acfa868bd6de90ea2c965b5c7e0f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2506314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdeb5e938aa163e8a393142866c7e2ace15a8e8079b87d0ee98b6b87aa471e7. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTAU2506315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2fc045ee60ce8c263385019da5dda542dd922b6f57be70212bfbc18c9f1f7f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTAU2506316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc034ea946ed547d38bc04bb0a6482e208c2c31f72d22a62044724812ccb06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAU2530398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d2e77d03b7f3eaa836c4cc78156249fd09d04751bea3bb42a223bd49df2620. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAU2530399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614bdeee4f6b4d3dd6ae7e687bd37abd3a23f291f375b79fa1b7b8a52357f507. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2530400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe936fcb0d62ab36721ffd64312a7b04bad9c90d5e409e90f5a5737d3af46aa4b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAU2530402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913adcb6f9f1080d559d3189e434e95d110114604c92c37f1818a2eeeef86a27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2530403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5d0b35efe0e9d027603906b1a4a394d9813dde22ccd69cdf5df5510402131. 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/QZTB42562667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcc50040d10ac315f1f3a67b4ec938a7e01fa77b1c41a8fae5e75885df09b63. 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/QZTB42562671.
Country Boy - Sped Up Cause We Hit A Speed Bump And It Slipped Inside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d56823906968f8ee9a3c09893f988d8a4a18a700e940fbf4cb702a9c7de0191. 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/QZTBB2528129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61ee57e93d6a444818c3d292b427fdb46cbd7d916b92f0b7a31fa08dd788641. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT6E62515051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff8fb7977f313c1bcffaf677bf5d9b5b1e6681b98a310e19fbc9148b763a41e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT6E62515052.