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 0xea472694b1e734c1072804e6abbd45d7add43f1eee2968fffa1b3085ae78d0bd. 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/f67993a4-736d-49fd-9260-4a855bd14b7b.json and https://artists.proofprofile.net/proofs/artist/f67993a4-736d-49fd-9260-4a855bd14b7b.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 0x57a27488c362a2eba322841f3697f2106fc015958a5bebe114c62d7f93dc091e. 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/QZNWY2146866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40df5b2e7a0564fd942401f8fdc2e4bfdd116bc92b56ff0f82e3cafcf13f2442. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZFYZ2243482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b833dcb515333486edc4c7443e42ee652d9d06b68e60d4a758f28b91687bb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:44:36Z), 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/QZTAY2212600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3afef0a8b7df1535e1287eba7eb82f1194e7f817c02ba85e498c39e94286937. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:50:11Z), 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/QZTB52254943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836014cd701a39e68c2918b93434f80c79d76937e6fdc5c799e272da140055e0. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:27Z), 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/QZTBA2221648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83cc97d983889c4c13893efc2a641bd12f20a0b94a4fe3139e55013adb5364a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:20Z), 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/QZTBB2213752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb3af2198216e77046301c8bb696973880394811a20f40a4c1ff21448546a6a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:55:29Z), 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/QZTBB2216232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c00fd9e552156d13e6fea3829a7acbe6fa71b8017bbd1c83bf419f585af186. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBB2216233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d9f602d2cabe0ee53c38e75b08f45ab6a1e6dd46e6b437106de71f8835b45. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZTBB2216235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804a6ff409af76659d8c54dc60bef77cf73d8c43eaf80809c4461ab42e78c194. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTBB2216236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5660864fbab398e9c5d543cf3345994bac678decaf76df9eeb63d0b652b69f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN72312743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99d84b57eea353c8a0dccf1a1c52231288a3c57e8fe695fe1131894900ab683. 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/QZNWR2321464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928acdca26dbaedf46675508b24961b497971d779b5d200d8f00b5025b8bab90. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZTBE2328492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c70e09259051dc9c9ce7b092036536c79c035d0d800b4cd413c5578b3631d6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTBE2328493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2536c73b6f85c0909ff16691fdf3f301c78526c17b5d62919296077a2ecf5178. 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/QZWFR2335018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cee22f732c3cae02a92459187fe563abed82a2b0484d739e5100fea650e8c0. 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/QZMEM2420426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177bc04af21ec6b15685c7728fc10427e7d141addb821648c1e27392badd7733. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZMEM2422125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0c816be7f3e9a6d491a4357540483f5cc3c88696df215c2b28e3383c9ba38. 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/QZRP42480870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee539cc16ddd8c3a15f1b5f868a0ea17c88db64b7d2bbfc585df1c2d2aa363fe. 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/QZRP52419582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b73d7c21050df4643111c46e422242c9b6a5f9ffaa76e2c031d072213e8318. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZTBA2418989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7204497f40301cc60a2540328a62a9e50d4fb034545b6027590e417812ed7512. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFF2421990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f20647a31548aec4e3369b1da048fd893c53ec6e3a75d63863d8bd7516e1a8. 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/QZWFF2465519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82530ec8b1458a789f81dff17f4f25bb143cfba31f6c6ed823794dc3745f6e03. 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/QZWFU2464979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6defe5c03a0b8564f93d852bb59eba5edf3bf54a92940bb74145511d14cc3b1. 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/QZZ792443897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e4e1be76a908f5bc484bbc83937d0db273bb1a33289cf04f21c781cf06255. 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/QZZ7T2467878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8685281f9becbb3bc21823f826d0d90b6cdd958ff554bed5d26a5a607869d2d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZZ7T2473171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f7fa7c631f53f010dfa4ee1b983a0c1c3dc82984aa0fec9502e5171165d835. 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/QZFZ32579998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4417bb3430fc58e686ada2e84d769e7acb6c020c693ee2119ed72c9564724857. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES92543350.