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 0xe5b2802d36dbd3879761b0c91890e12b5369d00536106653c47806b26d7bfe13. 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/e8af7396-d9b9-4785-99dc-040cd969661d.json and https://artists.proofprofile.net/proofs/artist/e8af7396-d9b9-4785-99dc-040cd969661d.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 0x30c6a3137585663587da74c90d586507a5025928baab34f794a37b0fb1bd1068. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAFL2113811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a3a128d1a39bf41c91e14c7f425f68e55607b86ace5dd248a0852d7de472b1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ZA56E1702160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2634b3c445968db38c8d34cdccd1c59446585f96c8ad039411c89c190163b6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:10Z), 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/ZA56E1702165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af1c6366ca828211b6c9a801e465a5905d7ced3f80e5e07c13afddbfd5e361d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZA56E1702177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e5299c46c4422f705ea343ce8152a9a94a47730be10fabfef81f3acc1c77bb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:50Z), 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/ZA56E1903406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f4df85cd095de54e569c6600704a2ae0a12b816ec149ae842b16c20a156e2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ZA56E1903407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4572aa9cf214014fa5e3149bec58951f6ad503bf8cda3041e7d0b3ff9c6c6cb1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ZA56E1903410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af4db4b1a8de99b8fe74f4107b8b384c44295aac2cea60858f135d330a3438d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:46:13Z), 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/ZA56E1903411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52fb666a9a5c082fa68de03635f6c1249a7d45aa0a66d4ced77c58241ec32c. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:53Z), 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/QZNJW2084632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e58130171250493d1e7c5216e58678212aee2321736f5f3f909e11050bb8c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:43:48Z), 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/ZAA6R2000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfd7feaef71664302230de0df878aefb2e3760d0596e270ac0503d9de64ecf3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ZAA6R2000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6588f749349e6a80c4077cff8b6f44b7be80d4bd1182eccc53d0a5648bba6811. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:04:54Z), 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/ZAA6R2000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6e623e3d4caa389853c9063df326c8b05e47082437bb26489d7b17373eb22a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAA6R2000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d94638094a755694e6c7fe6cfa2063980c418cda3384b5cece0a0dbecb1614. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ZAA6R2000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84f3e27143a1ca96aadbe47816555be49e9c15237f95ce5ecae631d55866851. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/ZAA6R2000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c977d2d2d6b17c9cbf458a49bf9a3b1fd537cefb25f10909e192022760db4b. 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/ZAA6R2000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d59f6598da346eea110f0e8b9020e692730c0f34ca54ccf604a258e7f54960. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZQ4X2200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d5970e5de206f55ccebfd12eff23cd6debe7ad482868be0cad749b41f2bb8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:37Z), 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/QZQ4X2200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be3b5954a68607def3c4f7e2e0bce7502f5a9586628f3ad32b80b1fce11235f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZQ4X2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dceb2a22411e6c3f8b2e6854d446df47f8a7e5444284723024d14d61d2a8f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZQ4X2300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15304f5018cccaef5d75a963418ab5bc473825c9799966f40eff4209f98429. 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/QZQ4X2400022.