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 0x29a0edac7a7defb026d420996d5c3e67a0beb8b4996f628eea86efe6a3d00cd3. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/264a5a6d-9109-4728-b9ca-286b79667c4c.json and https://artists.proofprofile.net/proofs/artist/264a5a6d-9109-4728-b9ca-286b79667c4c.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 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 0x08676a4a3f58646898bfc2d561ccf0c9d813ee56d9c137bbba73172ad5041cb4. 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/CZBX52100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6602015862f402758c91b792e83059d35d8b379ad982d2c539e50bf211338e1d. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CZBX52100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b812b2b7ef8bd96682f0bfb55f646317ceb68a0829904bf76f997aae804820. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/CZBX52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91b9f50fd3516274a1ffeea39d2a98771f83003106ef4603247a95ea4633624. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZBX52100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8e39b5a604850836476f4fd7ab9437da74d5a8c430f896a83bc5fdaffcc1e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CZBX52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e573c76b8356cf8b57753a355909803f85ce3383b638e44b4d1ee923edf788. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZBX52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d24a9f28ba57c01d8654507cce100e754649e26ff11de233190b6b4ec05ed. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CZBX52200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ecd4c78a79d7545e77ff78f9001a4bb9dcb0b017678b0406bc4025d82fe34. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZBX52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacdb0d346307783e903b0482b9081eba17ffc3bf2636c610df13456002f2125. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL6652204370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8748bc9d19599fca1d735d4b32367f1050dd7c26e10e5f8e3452fbdc8b8e3f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IL6652205135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f74d9e0428f95ec723c9338f4be7de8938fe5a298e1afa1d539eb01fa66ef8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL6652305714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79f7f2879cbff2ba21eff8205828e59b2442e688e618c7eab3b0d563f7fa4d1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/IL6652305758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca93b4193b0f4b9c423cf010e132c430c893e5ce75a2171218ac486dc0f44bd7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL6652305760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4b1e7b78f15fa5094a24122ab2f19ab1f6926ce53ca1b8ab1b3d84d93255b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CZBX52300002.
Speedlist - Artlist Slowed & Reverb Songs Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff9899a34740db0d0142d6fbc0f3c6e463bafaea295b06e3b83962f4220fbca. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/IL6652306720.