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 0xbea0ac8e3c38b4966056512dac79cd2cce558a32306e0b31379e457783516130. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0113887-35ed-49a9-ba0d-48ffe9963c72.json and https://artists.proofprofile.net/proofs/artist/e0113887-35ed-49a9-ba0d-48ffe9963c72.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 0x18e4d49048ca7971f043f2cb90cd30bd8e50fb1cc4b3d9e9ace53ac37fcba473. 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/QZ5AB2005058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90dd9559aa160d8a596282854e9b08762dd594cd6f2891835de7e89ae1067e. 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/US7VG1798288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38f34b5d83dc33cee21ba414b61b98ab5b3a3a93eaf697c784f6c902af180a5. 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/QZGLS2062456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a3e6818342f59552eb11b6b7d4d890594b7828b29bd7184b7e1c7e8e8f689. 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/US7VG1522951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f052817ee4eddac89943d924b00db29673cac78b8c3f97bb4d16f17c4410b99. 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/QZHZ32043781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0221091dd4d431bf32a5738d47a7ae530fa15d3493ff10da44fa6d82e92fccdb. 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/MX3741400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec7ef4d812ffc23e00eadaee1acd1b8416ef0294a923f9f8dbecfc5c61ec79. 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/MX3741400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd228bfe63539ca35c9d5fedff3ef4f730b152ed0c929b51a92d4af8b66ec4576. 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/MX3741400433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4181586e4f5da2a132dafea0c750323e7430e56734602450a1f6b681c3286123. 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/MX3741400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2fff77f49c300544eec301718bdc9affb7170c362937c24f7b305b77a8c7c0. 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/MX3741400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd419ffcc7ef43c00a2c5e68118fe0821d990bc81f084c54c6ed5ca72f8476800. 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/MX3741400436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098ec18b0143ce14513af9a901f963517e900a94145d81b414727261282ac60a. 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/MX3741400489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bffadfc13ea7463d4410c07fa39b0a6a198248f22036337d5d0852b4e985e9c. 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/QZGLS1942713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d39bf7023400ece5d07aad312de59348c6698837a6986982f503a5a7a5e0bb. 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/MX3741400491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc98336d4af06fe51365b46d849528585e0563351bf5f564414d883ce86895. 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/MX3741400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e89fc71d3d7dc02e7511353866a866cdfb3d8cc2be0c03a50535ed40bf6110. 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/QZGLS1942714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47d60184431cffbfef1f7b2c4309eda267431279dce7ca3869e9664ad78b9b2. 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/MX3741400494.