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 0xfaa15b3937bd8e29f04870ccfdcc935e083e169f2e9fbf8778310825d7f4ed7f. 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/af5049c8-18ac-4a91-b989-1970c61634cd.json and https://artists.proofprofile.net/proofs/artist/af5049c8-18ac-4a91-b989-1970c61634cd.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 0x83c116f36360b22299cb6676ba538ea72572698cea143f52b07670e181b92138. 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/CH7812355031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed481c8ad9957e5653844fd8962cedbe9897d5644a108a6a2e67b589f8dc77. 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/TCAHH2310744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc9ed56573e1743625e2e86bfbfcb2947787a78a37c1b72c84315d57b24616. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CH7812346288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd789733eb6f4b257079f2b7c0e95ac60a263f06f2aae433f6e71001d24ccdc93. 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/TCAHB2378658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1bd84fa76645e623ff90deb6688eb4b4523249f71cd139593f056a9ad923e0. 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/NL9KQ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d86b9f66bf02d7a51266995e692e12fcf63101e10a8ff9f8ea9235b118f78. 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/TCAHQ2340617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614e1a6c128cea17e2c5c1c068dd5035e6728d5dab134134ace75db809838e3. 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/TCAHE2314729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524a4886c8be275b5c31fbb2a4eebff20f23529cdda769ba874d910063e94dd1. 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/TCAGT2335790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1883cd141d35bd878180ede3e0a4506c6f6093d5cc549f83b2fa3b7306291. 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/TCAGQ2295934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70f4bb19216d33a1826ef05bd522acaed2ea6244090442361aae0566e3fb7a1. 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/TCAGS2357073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c003d9b043f5e27f626aa5e7e906e50fdab3a0f33618f01213d601ac2895f39. 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/TCAGQ2295449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60f6d3cfbf73db48c1b24be6f5e718e9a28bb1d962bccab5fad810ed2f4f69b. 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/TCAGP2268312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2dddeab68314899cda801e78d55badef331c26425d31c6bb0c1b9d6c02aba2. 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/TCAGN2235278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a1952d86907242584aba6a4768c7b52b86ed113def26f5ee0bef401e9e775. 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/CH7812239736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec3251aeb8704d0dee15e2faba836cf885beea2afdf92b2f537ec5dc6e1eed. 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/TCAGN2235181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2283c4de1d58d7af80f23688e297fac5c3f656d390a7c4003c536a5e7caf6edb. 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/TCAGG2231698.