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 0xad4e210babbb9b6bfd0c212b5d72bcd911cfdc3b59f18e244c03213f041f9b2e. 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/6d2b0906-955c-4c80-b1ab-321e9017755c.json and https://artists.proofprofile.net/proofs/artist/6d2b0906-955c-4c80-b1ab-321e9017755c.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 0x459148e36fd560dc6e4116a4a1e00336a4af058b50855ea67cd8ecd392e3dc16. 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/GBSMU7181490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3afc3f731e3a631529551ff16f82844a1889c4e6d82e9c572768f6d232d71d6. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/GBSMU7455541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35038759acfcfdcda5e589d9aac65676bd1cea9e564a5859e0102a76dd1b1927. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZMHM2033395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b4bb888900d0aeb57c914a80ea9d93cd5c7ae7c7eb97d584a93589481fde1a. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GX5MY2152903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e293932c1872af7bb2ab478923c231d3911b2c87758a0cfcc040730df4ed9cc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GX38U2248549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f626517c88c25bc5e17996b57e8d068e4ea64e3aa72a794cd8da32e6125d811. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GX5MY2280681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8523f706514893392b0b8d3aa54858b16ba88dc196f7e6db43d4a1b4d7cb31da. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GX8LE2278027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b89d61e46d7f8dd462790f28b1dbce524d56f8a736b51c9426acfebd8445dce. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX38U2368705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7052d5e96252baa821e46866ec27f600f7c02f453f0d4f115376c4bb6815ef. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GX5MX2382834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e0e4c373d4aa839fe5f4ea1cc72ebe2a4989c5f1943da6c57a45fd018283ce. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/GX5MY2324141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09384acefb2e96acc56c260b31e1745e7d87c95e072909ba8c204a4099d2c0bc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GX8LE2471788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3778e37ef6681cfe412655d73f6c7c40907ec7d0c7e833915ba4788a865ec7e7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GXBDT2414348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b744120fe5c05041f61a4a527e04c874c84baa7a9ef94b34843098886eb12dc. 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/GX89G2575404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8aeecbd9560729fa3ef8f027f849260d2d5368d478afced333ed305ceb767e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GX89G2501987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0878a70b035558d623730bb36520412e9ade91fa70bbde60fa568066ae2cd27e. 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/GX8LE2587528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2eaa7a3424398db16a7b5600730071102b9d230c9981b8e4136650ef7af4b5. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX4R52504732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65eeee889bd8357f56e758f23eeae901d2080e01a5f62c3c8de4b493e3cd9dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MX2518401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c93c4364a24d3d968b200f363e5a51f8b9088cfaede35d079675a17295e648. 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/GXBDS2597847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b218fadfc0878797efa033daf3da9d7667426e1d50454fb6f61eefd741ac77. 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/GXBDT2583222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60883ec74bbd9c3c3d554c20ccb6d6efcceea4841fa39c7e6e25e40cbe8b60df. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXF972597044.