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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79088dace3ec59c5ab456574b78d9edb2b1f260dea9fd1d8ff0ace1bcbc73c. 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/9323d692-61eb-411a-acbf-7bc6bad7c566.json and https://artists.proofprofile.net/proofs/artist/9323d692-61eb-411a-acbf-7bc6bad7c566.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675beac9331c63b738ce4eb530acaa6591e5d425d7792f7377da25dea3cba33b. 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/TCAEM1970319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675beac9331c63b738ce4eb530acaa6591e5d425d7792f7377da25dea3cba33b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAEM1970319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc4d816514b6f0acce0a90b342baafbccc2982494dc3d43d14bbdc0432dc05. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAEP1901846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179e240d53dd13bdb3701fd63d8d00821f7491f2a1da0bde20d571515e4ce9c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAEU2046479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7179e240d53dd13bdb3701fd63d8d00821f7491f2a1da0bde20d571515e4ce9c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCAEU2046479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3290b48ef19fb71fe4cfc2cfb1574e94b5e03e78a6e8a0cbc0796e210d91a2. 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/TCAEZ2070831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb055aa79f6bbf7348cf281ed245b9f524fca30fcf06b068273d4b4126ee3a6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:28Z), 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/TCAEZ2070852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3290b48ef19fb71fe4cfc2cfb1574e94b5e03e78a6e8a0cbc0796e210d91a2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAEZ2070831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6f0bd8bcedbca974eea7543f9b7ee254b81cfb74a4cb54f4699a54f04d7ee9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEZ2070836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb055aa79f6bbf7348cf281ed245b9f524fca30fcf06b068273d4b4126ee3a6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEZ2070852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff2f5bed4ccd2b1324f53963af17fa946acee395c2320e457c5348956542bd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWV2110992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591a81c59cd882f2f289765b3ab9f5504a6f06a2ab8ed352ee4df7d8652f91e9. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZK6M2249317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4018b8b52a679faf900589ade49b758b8091b258f6f64357db23984e412f6f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6P2320517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccc2effbf8db2b2a0639610d73c2cff9dc666bc014b13777c8e6011b1d03334. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6P2320518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c735c4a8161a57b87f46a03bf64898079d447e76b670bf3a950c7ae3aa3cd5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6P2320519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c0fea17226b4a22f0142b19d01a43d1d8a26e721008273eba566da1b6c804f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6P2320520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b30a206f90a9f51f390fdc81a42f20e7d57ff5ecf28b0b33ffaf758d0c9c59. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6P2320522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff2f5bed4ccd2b1324f53963af17fa946acee395c2320e457c5348956542bd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWV2110992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591a81c59cd882f2f289765b3ab9f5504a6f06a2ab8ed352ee4df7d8652f91e9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6M2249317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5378ca2e49e565664e1dedc5a9f423a0e5d197f84df5bb713c9446ba8d393. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHNB2555788.