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 0x93a9eade458907fc35619ff323053411311202255e787825eb148b625cdd2c99. 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/38a254ed-362a-47b5-9e01-2b3ab094279f.json and https://artists.proofprofile.net/proofs/artist/38a254ed-362a-47b5-9e01-2b3ab094279f.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 0xf2efebe0d9cfc26035c77d8fc02d9279d818e5137da829f9baefb0f49eda9d00. 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/JPCO08928320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6885d617edd4aac12c4ec33c1f8e730a85e067bd92d8c6636771463c803f042a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPCO08928300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2efebe0d9cfc26035c77d8fc02d9279d818e5137da829f9baefb0f49eda9d00. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/JPCO08928320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ebb6cdc4534ce8ed079fa2e0807620ebe2a5a6508fa17eef8e495b22100749. 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/JPCO08928330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a522b1500a046810f874759357b5e5b3e2783ac022c83c7340e6c3e0be1dec4. 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/JPCO08928340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498057725b819ceadc1e9e0a63c5c03d20c1d385447812384f03700236632059. 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/JPCO09000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcce8d03bef28be106bc9bff9af2bfd676c41feba4b2ee31b714259c05afc39b. 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/JPCO09000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf7d4c3c55f1bd8251c3bd031bb685fdbfd588dd8e318846e4124d9f5cee9bb. 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/JPCO09000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde46702a4865893a36328beb0a2bc35016d6bba019f9c407c70b20c10adfc13c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPCO09000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c6c81fe9b7a330b0b1b3ae750c30a2260d053cb15e4f51d9c05241d9e6dca. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPCO09016740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c6c81fe9b7a330b0b1b3ae750c30a2260d053cb15e4f51d9c05241d9e6dca. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPCO09016740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0e388279832bda09a728a8bc6832d8aedfa014573780077b69ad2987c3a9d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPCO09030860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229d01f8ea592cc50ab4add5e89913e8d98657911f455943f9a2858abfb4411. 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/JPCO09030810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece975e9bcabc18a88d21bfb19e40fe340ad6da083a1879e9e2c3844fc49ff6f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPCO09030830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb3fe764e0b7d893ace55efac4fef2dbdfa61c9e73a45b370ffe09314985eb. 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/JPCO09030870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbf54e49c4c8c4a07c0808baf09d004b62ff5cfa7f0ff67820460f61702e33b. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JPCO09030890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0ab876b0fb6cdc4a25875ba23dfc3594305b620b45b594e428969ae24ffb8a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/JPCO09000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0e388279832bda09a728a8bc6832d8aedfa014573780077b69ad2987c3a9d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPCO09030860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef2714bb2e4845a0dd64f6fd499ca17b02c6fbc3b1ac32a1f6ce7fec6f8f5b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPCO09030840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e88f6469ed5db464b2f829684053751099b458850955281a696a42ec79537c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPCO09030880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa7d27020058a090585d8ccf3c241b5adfb98b4ab746e5822c9b55bc3c6df29. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/JPCO09122580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c2b764860f67132227799f2cbeae0e2f7224e3bcf01c9fff8bd085c321d0b4. 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/JPTO09248230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a1b238e1373431e332d9c016be9da34092052e1f2586576272c6e035c61bfc. 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/JPTO09248250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff167ffcc5888390769fafa9d5a97793ff724fbe2662e72f84fcc3f43edae132. 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/JPTO09243110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c63fd6f4a27904d86e3a6c2ec81c0aaf1507fd1d16dd874777a2c429c37651b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPTO09231270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a4c1e96be61693befef721dda0a68b9bacc6879858f2e280efac8634fa73b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPCO08928290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbc210499cb83c4c62e2d016aee92f01c283fea72772974860f97633223cfe3. 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/JPCO09951230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a4b2775c204794eb7b1e510e024fac7034941c33977680d2d4e8923ca2399. 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/JPCO09951240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8747e89162b48b510335209fcb01ca3677c0ddce6d64078a57673feecb5f34. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPCO09951260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e018e7aebc52a1756dadda1fbfeb89e6dc3060bb902014db27d712060cf2323. 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/JPCO09951270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1a4974b09a9febb4296ad0ca13b24c52af2624a7c4593906ba293cf32ab344. 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/JPCO09951320.