thumb|right|Honduran mahogany tree, Swietenia macrophylla thumb|Genuine mahogany veneer with a special figure, ripple marks Mahogany is a straight-grained, reddish-brown timber of three tropical hard
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 0x1b7bf967b3f467914b4fd50e8021478f308f018724e821797da6e34a32177081. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6fd2bff-8cdd-446c-8281-6dd1ddbd555b.json and https://artists.proofprofile.net/proofs/artist/e6fd2bff-8cdd-446c-8281-6dd1ddbd555b.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 0x578ff29bbeb400ddebf48915fde395101e60294d55d0f1f22894a416d9806ab7. 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/GBX721900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d515f6ce96fe368fe92fbe84a1541e6eacdfdbac39701b5f51e75178d485f2d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBX721900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa972b4c20df1ece90409d4ec5d8ab4e1217aedcb194b57c3dfad9f4654c4a604. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBX722000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f33e1e82b04a6601ffcab67051c07e61c1b1f2300e26b077a136a46e5a34af. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBX721900599.
Chin Up / Safe and Sound (Mahogany Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722afe7661bff4a1ab0463ec8b1f6c744d49c722eb9f43225587c1e78729b243. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBX721900484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7976696cd1e3984674034054e19741dc1d7ba90e00909d05d891ab96cc37b9c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBX721900485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa4d6cef562a90ca2d1dcaa1373abe5f6819e9f390d4b450d8113c53838dabd. 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/GBX721900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6170d908beb36252b6e52902d8f9f2bd8ea6ba4b07a0defd4a81bdd3ce1752a0. 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/GBX721800242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896237d6b4768874d4f3befb6aa1fce5fd62af479d3718f64dc2a293f4e9aa3. 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/GBX721800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d8e1e756c6714ce922592bddf1027bffdf957cf53285be0c6be4c55ab9d02d. 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/GBX721800313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d1ec339e931b252f15191575e523293414956f0b23128b003d851c9d5b1000. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBX721800314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316655fcdb6f690706679122e23b783ce60a1e5e081196f4ffd7ba2b43caeac. 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/GBX721800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb63eeb2d5830cece2dbc7c79dc4bc8db7d44e0ba1ac725b6dbd138ef20a27a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/GBX721900113.
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 0xefafb02b7c072732f5d72d16aabbe1f9466107336859a29a67fcb43ef14c5f38. 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/GBX721900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d6cb1f558ea1fc88c8a4a0bab8701d035544c6ba08107d9aa05c9f50c2d3c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBX721900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40c1c7efb3a848df93c4e49fd86223e3f3e9a73339dcc103568ab21a4e1ec2b. 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/GBX721900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30ebc38335c2fe17434dbbc4fdeda04a2988111380f1ec20bd633c67f337b98. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBX721900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b71a807c77edc8f7f645d83921be9c2cfb23e755009653017a52373a6129d01. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBX721900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1cede707b81ec2389db4f753025ac7028af04517b9faa8b60a456cfa2ef50. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBX721900668.