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 0xb246a5aa5628a44fee02bf059ec7f2a54389661715e2b8c0a0cda562bf607d18. 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/2d782939-c2f8-4249-90e8-66665ab06624.json and https://artists.proofprofile.net/proofs/artist/2d782939-c2f8-4249-90e8-66665ab06624.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 0x97b8099605edd2a68caad0ff7417e83604ad191b01c2c573fcfa371b07e0ec9b. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZNJW2011839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c021a97ac0b122e0d4661e14a4f4cfca46ee055f66c09667dca69e9b5fd39b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJX2027299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0355a124f23b794b0670c01ba89a096befb92238b6e12cf291c557d910ea0f43. 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/QZNJX2027300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b008314e1fe2897b65b6b340995895f26b01de07b4fce7ecc669cd81f810c. 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/QZNJX2027301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ef6c044cfd4e561aa627ef56229cfc3c6d4ea69cfd456e3a0e465e924e5d0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNJX2027302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99746a31d5d3c8e9bd70ca667890538f49ad5018e1ca39b9aea5eab22a43ea7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNJX2027303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616608c069b3f4a3bec92cba05edaf661075960779f7d4cf853a0c13e7387d88. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNJX2027304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd287a8203b77af54b987986cad9fb90ea51d39eb68e6370c8009f42c6b182b. 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/QZNJX2027305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9765cbd341033ac56efff22c0386032021f21c62db264858c5a71efc058db1. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZNJX2027307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d5dea8655fbbf1046fe6bcabc4f3453d07b9c8084c487e413a10a6ec627ada. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZNJX2027309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82224849dfe33605a107e5210c33e351c5ffd7c52ea5cce070c8accbcd378d6. 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/ESA011527400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b40f7aae557a24b0baf00f181bc25bdcfb7b66f4440811d942cd12661bc488. 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/QZNJY2172557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c46b42a803cc3e6fedbc27fc927ac6f64a92cea5b4ae0d3a95310152ff681. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2236766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24afbf17d415d23579e5ad03d4068c7de29c39c5689e9960cc47fdbbf1b5075c. 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/QZGLS2236768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d471b55f348e0f1add8425e965a6cd5905c60beda0273ee300b5a9ae731c2. 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/QZGLS2236769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22540ea3e92c51b00bb0e4269a1b36ad91749970b931467fbaad41225bb3ce52. 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/QZGLS2236770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd73e43690300486136ab3f2b13f7f9f828c767752a9045361cbaaae2be070d7. 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/QZGLS2236771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940c17b1a557152a432ef4b0aa68e14cfcffd77cf03cb0cf2f238a5cdf56f54e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGLS2236772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f0f4585352dc4e2912f459c14dd61aabbc258720f4c61964126919898efc7a. 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/QZNJV2311755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0772714f1260633ccfb9a6aa25185fe38e8456658bce9a913122cccb763a28. 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/QZNJV2311762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593293436d3ca97bde142e47bb28e2e5b5b5b9f171fe4b382af169ae9bc4a8ca. 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/QZW9K2374477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d6faa2a22903118626bfd58a47a393fbdafa607763ddee4d48c30866d41a5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:07Z), 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/UYB282311000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bee581feae4ae579887139a348be6cd886cf08129e46c318c5a800086516c5. 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/USA2P2158077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1a63a1eaf58bfef33005c89a743375dc389d7704e7d5ad3dffdaed7f213799. 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/USA2P2158078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab61bfbd6493f0cc6f93d6861963b472bf5bcab76b5b08b6f0f2ae92d0c2dbca. 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/USA2P2158079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3f0795f7fd6d7d87ba65a54919b29f28818ff427a84e057a9cf11d76860c4. 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/USA2P2158076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a2475c620e2ed3b45458a01c5c7b5fea155f1aed72b4dd7b687276651bfb42. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2433495.