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 0x033cd2d1ca2f56486886a7941a0765be7ebebc04a8d75850bee6107970ca9454. 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/4c0a004a-fb3f-449d-a9b0-849e757a111f.json and https://artists.proofprofile.net/proofs/artist/4c0a004a-fb3f-449d-a9b0-849e757a111f.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 0x4fa6990ce2b139cac6a07b320dbebc41eb35307de3504ed9bfc051741b2657a0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAU2373106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d66fb7cead76ea3a0ebbfb3a26d27f5e836a115724449cd2ecb206a2bc4e0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:26Z), 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/QZTB22357621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93172d2a38871f70e94d0fd877bd51ede0e966d180ec1279c5a733e085587215. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFF2360856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb69913868c106637a176d8ea5756820e4c9c7e327ee2bcd7820099c16c664. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:36Z), 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/QZWFF2360857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae799de81a7ade3138f06cbbe427fa685de7adb838048313c16b35f51fcbfc80. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFR2326470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7cf8202c85c8a096bc4c2f3d46ca918931a92f00634f4f86496782db8769d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA52518543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471b9954d687846172d06eabe5309c8ac327f6eec18a7795c822cce3ae0796ad. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWV2580027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbd9422a984ef7c8573f609e38b99f4030ebe346331b5c36e7d6447af0cdf05. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWV2580030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980139237ad5e0ace86e1f95fc6b8310dabf2adc30d379f04010549aa29baa70. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB22564303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4006469269180b0cc0f083026fc260da25540faf76be33d239e7cf1c7e9839cc. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB22564305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e8a8fb8cc84bf253169d1149a4a960d548150380735279a14819ba7f589e49. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:58Z), 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/QZTB22564306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b765a11e0e92442478f47299dbdabff0a01d565d53d23a1f708cb93108cfdc3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTB22564307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45110e2b1a14f7c0518b9f337ae6b554b0d7918957f82d3f04162716323caedd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB22564308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291132c64763ec30384b8ad5963a04c58ecfc9bffbc224f02d6b52f88fa5936. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFL2537605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44490c03607c6d3090454761ab547e85c891cddd61de88d2a8fe9189ea0e50a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFU2523510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d25317048f687639a4823d3c5febbabf41dcbd08ec3a69fc52a3c82b056d0a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:52Z), 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/QT3F22571844.