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 0xd652fbaed7adde78e1ca3b7375f117b94a8e1e794156f2bba0d1a5dffd167fd0. 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/774aba88-bdd6-441b-b708-af1284b1cdd7.json and https://artists.proofprofile.net/proofs/artist/774aba88-bdd6-441b-b708-af1284b1cdd7.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 0x08b55d125d6ef724fe0fb1d84e731ba61e5170a7b75d4c848259c10bf266936d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:48:24Z), 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/QZ4JJ1730546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3cc9c87a2e98e6940d3a8b5ca1a15f50f86fe56e058bbf838a1be89896aff7. 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/QMPKX1796317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8b3c0ab411760673078c9b2ed54412e08aa1fe88411661918d0fdcfba953ad. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLV61725165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932118e68e980471fd0f9777c57f340b7212f338a778d8b4a9ab13396a44b038. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLV61725167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2da73ae55b2514563898c5507d15192da5813840a3dfefbfefae0afefa824c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZBRF1864969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b21aed3ff7407f75db974395d96460d4aae5b1db3f1849902525121c7c537. 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/UST8K1821697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d773a8bb5af0b69994028699bf0d02003aab8a46bb5a267e118916a4025793b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYW2026615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfb97ad00976c980b3bfbb1f8b09e92773f73a7229a7a6b61a00d1c093f15e9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZKDK2097767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce198ee8fbf9c65fce482c2aaaac29f6dc451eb0afeb24bc5b69c5755d576a3. 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/QZFZ32180512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e6bdb7aefc180c2e1cd6ed9d2f107e916689560204e9e861ce13d2b9cf1a5. 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/QZMEM2125295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a345347379ecca814532dc29e354cc0145b7c2fbc33a256db4c40560e5bf6c8. 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/QZTAT2149844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55c4a5ecaf6238d3c8d686c8b53f23ad5b1f5360923fcb1a6e7e6b0bd759b5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6Q2279824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dea9026e1a63d33e72ec6ce854b3e3aef6c18162bbbda4687acb024aaa3f7d. 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/QZK6L2232958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719637da235d416b90181dd819cd2d15eed623384818e0212b174ceca501c1d0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZRP52283243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d13ce0000f18bb22ed0d8f8246a9874470abe361305951f177925d2c69354. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ72301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a6024415a2c18535ec12e06fd0b8628fe3478be81d5bb6722b025f5bc53bba. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZDA42364898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350d648f2e2a16731ef9cc74da80dc5ee438e8470d78a92e498af94552e486dd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:52:58Z), 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/QZDA62323603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff3ba5971d63592696a0c62c288f55e380e4a769eb5e5b926dbb0bba9fd4c8. 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/QZDA42350798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc3618ec01e18b331eabd5f06d7470bb85ad7eb220144a580da76a68de6af9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/CA5KR2342053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20bdfec5260eca553fdf020a732401dc62cca5d88568afd6d5f4b36284116a. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:47Z), 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/CA5KR2342054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d245bcadb64f6a609f2a0157bb05563a4d244eb035ad63dfa819d241613d81. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CA5KR2342055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c547c85f38b9ee26daf7c0177a67943fe4882e72463b99692db62250b38e1e3. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/CA5KR2342056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350d648f2e2a16731ef9cc74da80dc5ee438e8470d78a92e498af94552e486dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA62323603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d155fc7fcdc979c88e692d84bddff13b529615b9e0577c385e750f49d2544. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6J2340752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbfbaf981bb689bd62a43584d4fd35bf236dd3b9c5faf43d758ad6bb5733898. 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/QZS642339764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe6e9cb06bdc5d05401cf435f6d6381cc852b058021eca9eb04f352561f5d1f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZS632359110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201e3f34a2678a3c05799b6a97a7b26d9de45fe70b56aac5ed686116cfbc5aab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS642324616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e52b899b4b51968284d98c2fcb2606aac4fefefa9c9a751edf2d883fa53d17f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAZ2380129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2197bc6dc62f7aa84aaba3519842dce5e66d5bee525081e9421394157196dcbf. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZWFM2364117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb99fde5f44e5c6438e6c07749d7f3dd18152015b60c9f8e064d42f05e6e32. 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/QZFYY2484445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f06cd7d6c7b5a69626f01d18f1ab576a3e6464506deb5e673813eeb7c1d7fe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMHP2441500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01008ae7e3fad018a8a7b9cddb8137f7a40f4d8c83037012a4d09a305046c3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFYZ2459944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29408a91ddf916f8b57719969f274f59b2cefd886f2d96c02e5587f7a1297d84. 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/QZS652400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635787498be1fdc0ee91937a89a8151de604a10d79162972bbb4dac19b5c7b67. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7L2405498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449d6bb90c7ddd2a3e13a62fd815d9297cda177c8262e10add3d3cf44fe44a2. 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/QZZ7L2405499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6e81f5ddb1698e477c597791162050535a8786f09c80f4a44bb47301f7e6d1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZZ7L2405500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834f817481ebebdaafd8888114063a5ff7ab4031d20c3a6c1db6f16f292c7905. 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/QM3DF2000396.