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 0xc6a94caf98b2d271f3a028bbaf42f56733e6ceb86a86b6a38c2a3e99bcc2a3a2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d65aa4-d976-45f9-9aaa-140b5ff88835.json and https://artists.proofprofile.net/proofs/artist/e1d65aa4-d976-45f9-9aaa-140b5ff88835.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 0xdee0f41aa407f44dbb2bc5c63ac368d2ae606c2bd40c85e820e1db9a2a05c31e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72106919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1318ab85e1f371140d72204854d7cfcb8d4f094f02d21be0dc7c0510b6a97aad. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBUM72107824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34da22d874033cb64b575c8d96a91ad490b6d902ebf1d761fa6d2f09207d615. 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/GBUM72107813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fce32c274f7f18e32ebd78a441605550037d01cb9661da9691730cb70331e. 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/GBUM72107820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e93350568aa827fc7dd6a1784153a01585822ada01a5510038dfd35ab085cfc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72107811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1318ab85e1f371140d72204854d7cfcb8d4f094f02d21be0dc7c0510b6a97aad. 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/GBUM72107824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737231c3468bf6c564d5a82dcd163f54d3d3da73a3b06a32e5ea26685dc72615. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72107812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34da22d874033cb64b575c8d96a91ad490b6d902ebf1d761fa6d2f09207d615. 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/GBUM72107813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e45d119fffca5bdb139547fae3cccdd829652ca170a0fe65f8ba0b0436fb7d. 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/GBUM72107814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f8b3fb94292112a051963d4481a59aad6aa5084b7ce5033bc2f416ec636f0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72107815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba1f3dac76a8ca77457632bbcfb0161a758e6afcc78704f7f5a7a4bb88fe16. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:30Z), 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/GBUM72107816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee0f41aa407f44dbb2bc5c63ac368d2ae606c2bd40c85e820e1db9a2a05c31e. 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/GBUM72106919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82351fcd1724d8a06012a5521a4e2aa708c549fe463811f19d8ac4da6298ece. 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/GBUM72107819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fce32c274f7f18e32ebd78a441605550037d01cb9661da9691730cb70331e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBUM72107820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092f1fae936a8f1b5bca6bb1eebbb71f668b4b508856222af3a898030c5223ff. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBUM72108130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a35832c8d2fa52b7e7dd9d19edfd9a3cb803cc3d915c915a326385322f6ed92. 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/GBUM72107822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e366bb6e847388ac992985dc99c0523640b89efe0b7a158dc36a077db633c7. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBUM72107823.