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 0x335950db63c399cb3b2e2d64ff29085633a9a8a9f9f9adf667ddf6cd81dededa. 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/a675c904-9931-4119-9cc2-37a7e2c827f2.json and https://artists.proofprofile.net/proofs/artist/a675c904-9931-4119-9cc2-37a7e2c827f2.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 0xec28cb985965452adc415e3e173a885abbc177dbcb226df40b916a6b6aee43ab. 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/QZK6N2386977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6de1d0152a6cc3717f1242771d84516f26467a4f1515539fdebee66f488ada. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6J2365090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf318c4f8adce600b4068eb8da068296a0d06c5a746a98b7546a9abb88cbef5b9. 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/QZPEW2477666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa942593991568e70030892337a6268ac4254c63baabc3c60ad0e0f7d524a0605. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZVEM1867580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e98c665fc02603dfb2202503b594efc5eb30e8b9e0ed92242ea91ada5a9768. 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/QZVEM1867581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8a60875945f0808d27206988c6cd4a3faee41432d472b031d86694e475140b. 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/QZVEM1867585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972439c087ceff49b0a04d2dd7f8e00baebace7d98b26a16eded8808db025d8f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZVEM1867586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63df0e410bea518cdd15fb826493f19dd9f0bb2bfdb6fbe95d6df8f0ce79134. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZVEM1867587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657d327c4b92a36ce1c9a1dbcc28016900206c5bfa324bf851576b851b4233f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZVEM1867590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef50fd337e76d1de36083906396d1bd551106e95b105c95e4cbc2a599353630f. 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/QZVEM1867591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7325a0991ac351874c89ba0ceadaa93264a7c729cafef91e0de99ab2c8e344ab. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZVEM1867593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ded4aca0d5e28393f7541d151999fc3c63546e2e84753a0cba7e4b4f87ff38f. 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/QZVEM1867594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcacd8d2a78854f3a3a060e6eaf6e4ffbf30a5be27435b6f7c8104612764c9f. 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/QZVEM1807411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b7571d9b8e36089537743c987fa3190a766e1946caab6128bbd08e9d5e6337. 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/QZPEW2418329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d6753f03ba662d1490a10d0c80950e52ff056358031fac56ea1f1aa17a9d8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZTAY2328088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b00541ad73cd45296c40b65a687fa8c4e47a17b4f658680febee3f3f336fd. 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/QZPEW2418330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cb90f578a46df2ec4b8675a4e0d2f9a36fab197417f55e0b7bdf14ef87d404. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZPEW2418331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee83a4e8133a394282e040175d360db2b4299154fcd867a466f0f11436ab29c4. 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/TLVEM2470389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44006df836ab4f7b495219f2083d7701daffc7d73d8bc4b132df2cbc17d4e8d. 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/QZVEM2388421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5367347bfc52e80ef67ebfba5abc67929c3cb0cbb6dd398f6c81ae7bbbf118f. 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/QZVEM2398187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3db055909df9ab1cdd3774d550471ac9aaa60eae920b5e349ac2b2cfc91405. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZVEM2576235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39553a12f457c45ebdff607ee8df3ce9cb85b31955531c4c5c35bffae90d7360. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZVEM2596665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf916ac9015db83b9b6cae6d6250065ecec263fce1b8920772511f53f61760525. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZVEM2596666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfd6c608a0b3edc977550b8149bf84c7b83d20bea08505ee15ed66fe0dde07e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZVEM2596667.