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 0x9d48899bdf2d419191213ff01542b7c5cf5a3d6a8f07435f5ffc7b635982f5c5. 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/65c5f1a5-4769-4116-8b15-e788d6ed16ee.json and https://artists.proofprofile.net/proofs/artist/65c5f1a5-4769-4116-8b15-e788d6ed16ee.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 0xaaa5eee47b495505e79f5c11a26e75026d3fa0e59719a76e5435a1c950785ee3. 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/NLT2H2300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6359f3e0aa5244c98f0646e6ada25f8343bda71cb47d054f70b6a598bbf48c9d. 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/GX4R52372601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6359f3e0aa5244c98f0646e6ada25f8343bda71cb47d054f70b6a598bbf48c9d. 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/GX4R52372601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54089d4b1ff4f8e41d4184ef180287657ad773bcc820821fe3d14c51a401b7de. 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/GXBDS2303171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d56673b1f95165d1a074e2bafe42ed6e6faab10923cd57697a28671f7ea86. 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/NLT2H2200617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75cc345f8d426d278b9c72720fd9f699f951139fefd00a0ee3622c622bfe72. 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/NLT2H2200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbacefc686382fa8c690baddd2595dc9163f2b338d2927a56d979d843d50d18. 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/GX8KD2324749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9711bbea5c74dd38f674b3e32d475866c4fc78aae73e915bcd41b026b572c66b. 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/QZNWZ2290998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadadade4eeff702682d2c1e9b677ccb3674a6ef3e378ed9dd677096f619abd85. 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/QZK6H2204521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb8f11ec516bbc9a75e17bae7490a69cc81d7344b77530beb49a6e291e9bed. 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/NLT2H2300364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c98d94465d5d810a9b26652b65167a4907feaae3b06d23e0a399920089b7482. 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/NLT2H2201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716f18de55fc543d879c8b8da3abf2483c26cc38787d02cccc4f0ece7faed392. 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/NLT2H2100482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d1245ce83a4592d245d3c4f4ec4cf248d8f47b31b7dcd946e43c36ef216fbb. 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/NLT2H2100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf16374098178375f8ff7b4f83759318c42a19f4b7206a7ee192bc527d813b. 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/NLT2H2200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0486a963c4fc403ce00cb647f6861f157b16af1ece7b17a55421f88731aab085. 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/GX4R52383355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf9a94ef3435a74e1527d819f2515b340d47d7225dec635548822f6f33a0f4a. 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/GX8LD2340356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94d8312f3966b86e36513e9cb0b8a71f6d6ee5c2cc0c4cc24def7787bdfb77b. 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/NLT2H2200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68be70704ba7265049641050b3824952448396edc5b3b1575384eadea2a811d. 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/GX89G2268352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73298165ce5fa200e24e73b7142a5e5ce7ed802027fc204dc831222a81664e0. 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/QZKDK2005518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9774e3baec5b806f96354005c136f99bf112c9190d0790bbfdc7ac6e4027021d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:44:35Z), 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/NLT2H2000360.
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