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 0xc5478ddd7b322223587d5e6c830e27c6f6c9b1de1b3312234d47daeb57b2a15a. 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/58095965-224f-4588-818f-915d0659e821.json and https://artists.proofprofile.net/proofs/artist/58095965-224f-4588-818f-915d0659e821.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 0x1933b7e194df9570d39e449e659003e2269f3afffec020d0d9a1e65479a73992. 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/NLT321400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae5654db2f5a1b75aae270db860f95b91dd34333c80155c83c7f894dca56a02. 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/NLT321400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21ade7188e7c1860a935350429137680a71df5bed50bc9a53f47c24c2ea4408. 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/NLT321400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2880a6072b1bb41dcb20dcf8a10e16dd50802c574d2c4d4f0987ac50541a8e2. 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/NLT321400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e604994b2dc52d9f096b54654e0293c4709b7cdcbd644737d5301950b6614e. 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/NLT321400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517692fa53c99ff1e4647c1ab35ad0cec8217ade1aef1f24ec3c41722c107ef0. 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/NLT321400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb080c3c8a483e5c6106b458eadde15b87dd081baec6dfc20a2ec5ef011edd80. 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/NLT321400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9976b2bddacc24c9f69981c103779f7024986a30d76ba4e9fabaa3c31182a5. 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/NLT321400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964628258dc1a4be24b55312f53fcaa44eb5dc67a0206701a5dcd0404b6a3879. 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/NLT321300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3275f1d100f4ddc08a0cefc16354b4e46f331e145da7803e352714a15134989. 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/NLT321300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd71d8abdc475e36c2ae0bc75755b9a9f4d43635592050ae19786f8e68fae9c. 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/NLT321300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fca17aa0e85b15068adc33774c780f531c21e2b2d5045eb68ab6d0749bb52e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT321300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4394606134bcc037afe1a144703acd96ae6d59f1182a0b234085eab60c9404dd. 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/NLT321300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de29c038bdb8a5567257af325a2b4cb162717ca264ac307ab848a1aa627f254. 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/NLT321300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d37d049b12ae5ffbc0fc75e7fcc521c7ed3c747a0f73c202dd4d0c4e1cdc0. 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/NLT321300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee1d85dbae2fea857aaf2c5e3990dd3885aade9a61abd83a0113cefbc98fc01. 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/TCAHQ2383207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0591897132a4107c383970cb965ffde52ff5a99c3300feb519d6baea6263f4fa. 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/NLT321500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d3e07f15d6b53780abe85029b0e8c9df6f676a0b90000dffce68bd28c658e. 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/NLT321500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d9b0b933f6dda730f3201e59fdba71e18bf4ff6ca5210310b048a96c16742. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLT321500003.
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