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 0x05fef04e10ad02f3a0766c459bcfe1403d2aa1cee6200d96199a03a4997ad4cc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4913fdad-a209-4e6f-b29d-6c2edd97e92d.json and https://artists.proofprofile.net/proofs/artist/4913fdad-a209-4e6f-b29d-6c2edd97e92d.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 0xd01b5c74ec368a437e852d3f698e36aef88957d5c373e5cd6607457e13d85289. 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/QZJDZ2100058.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a329ed5c019f8b138b2af9b5b0da4ed61d8831ace1e229770441b449cb28e2. 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/SE5W32103217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae568ebe3c8797d5969dcf2a0a1034f98c4814989f06ef427d36fd63b16843. 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/SE5IB2233873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529cf55cb2b15ab0d8f7ed9ef713dcf832c296ef0a1a764b9258d054700b0714. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:30:49Z), 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/US66W2201976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3b32c684ddef0ae54320c56d00f4645d56c5a39be90db3b13e8c56606e7471. 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/ARC572402818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c6ba60fea210d47413015193bb9974760f372ac2998ab12e53ac463fd7de06. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEXGF2399140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f968fa67f9e04977144cb8c319d8b7634a34c274d827af6719d327ac8b09dea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6RU2121401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c8e7f546ea9056fe11b5ae4f9a333ee1834e15a5312db301c68031ece5816. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5W32103613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e44ce58f2cee85cdc8d7f95ba8bb24464d31fb26a1c83a93df357c1621d36b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/SE4RG2183102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ffa287171587a36549e854774a50b4811707421aba47f04b7436726cde2718. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:05Z), 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/SE5W32103354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ca5c4772e08bc3c0f1b710f563c0809388c1263cb89c68c422558f71e8d9c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:24:53Z), 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/SE6X32158805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42728d39228f75d112b06a48a8d056d527317cee24691168457adca31bac15d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5W32100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5dd70bbb6d825567832a14a2b2f26aad496edf68aa0bb18c4473c933be715. 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/QZJDZ2100893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c0b3a07a78b25d10d5ec6094b80e468563423af8612f26d223a4b7cdf8940. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6X32193302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb7aa87d8618e7041b261045f4ea6ec5a39b912bc244d943e90a7717b7a2d44. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEP2110758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c260988c5c494d5f0031a6860d9530d17f1d80d0624bc48b91c5cfe5e0af3f4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/SE5IB2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6844ef984a5436b4e3d96c17c4cc7137e945b66b75c5d5123342c408eed5dad1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:33Z), 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/QZJDZ2101084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8408ed4f173e079f04fe2f4c111bc6caf0a19abb5df2ea588713634f1d35f7. 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/US66W2101229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac6c12ea8a758fb9d6eef361514c80bf62ebe1a257d555f57a3268aa880a939. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE5W32100810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f918c049bfc6bf1bee6e70a45b414f898a69c1d450602617912c790853f71c1. 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/SE6RU2027103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b723c8012ceadfc39bf29a90744887113ee50571fc63d97d3822b0836d06013. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5W32101600.