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 0xda877e2d7292952670e907d182c8a0a967558ff965d3cd00faad9ca762bcdb0c. 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/c8a0fc32-8e19-491a-b5ac-63ce62333a0e.json and https://artists.proofprofile.net/proofs/artist/c8a0fc32-8e19-491a-b5ac-63ce62333a0e.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 0xb8953c83a953f259c88ae6d3782991b35cfad50b839fd06c17df88ec613fa415. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USAT21904110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd307e783215ac75986bf11187babdabf06d49aa947f35001975bb77703565f43. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USAT22002287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa881e499ef945a84e2904332c5c8c1df8b39ebc63ee53631f15d82fb447b6d32. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:53:58Z), 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/USATV2002043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f87d8550e7880200bc7e58c6a446eb133a3cfbc85eb47d49fd375608d7f341. 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/USAT22006329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4ce27809a3e37cb748dd9f0da5fa261c01b42b342e3ffc107e2929e9cef458. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:33:10Z), 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/USAT22006330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82719448d9afe766a1b9d9be96e27bc8171da7b3713fc38bef4ccab2ec61cacd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:49Z), 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/QZHZ32090629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67a58b1a5615a53eed24dc33e281bf1c6c8682c7b3f1939cc23569436bafdba. 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/QZK6J2169371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef6f3107bfbb7620380b1475b4c847428c7f402bfc96ffb49be996447e7378. 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/QZ5FN2327439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda9dfa207875460d3e7fbd9d87f43b635ab4090ed1847bf2f1dc7d0da72a41. 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/QZ5FN2383420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8185cedbd564bd176f8d28591f2314178271142a86639818b3558439838a6dbd. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USLZJ2371620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61582091f679e06a5313adc0e627ba15590d601877416ffd184d8130098f461e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBRKQ2368055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83777c76e63cae865c5559befa4f1881bb6406f86baa5844506446a060aee87. 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/GBWUL2399297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dca65035a5690c63fa165144a9be9bd61afbc776c2a186aaa4b86838fb8563. 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/QZTV32346132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15848705016e57ca87e75dd5fc3bad8758d2c54b74d648eccf8aed44d5ff0e1a. 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/QZTV32346276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d16a25235d0d040f9d51c7e23b3e98bd6f58109baa4307b7b152d4d171cd0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTV32347212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743ed2483db9d7dd2b549d5582341055eb541cbb6695e672bb44b1ff0de5a658. 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/QZTV32347253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42f3d0b57670389ecc78df182e44996d55818e4cdd2788b4b790199bf30f872. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZTRX2391352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83777c76e63cae865c5559befa4f1881bb6406f86baa5844506446a060aee87. 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/GBWUL2399297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9259ec9e41719f4e56281e19283536691e77eaaa3900ee0581c99cc75186de7. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZTV32351200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961e071129d5632a48af69dd615de23278dfc6e3c6bbb9c68cf5b230cb2e9618. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTV32351203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb8bfe6cf1e38345b8abe14c24623c2cb3152b09696c4dff96c3ee8594d540. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:54Z), 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/QZTV32351213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28132c7c00bdf45271cbb3e1417c400aec5f32043aa1e5564eb0b86c0a85f29a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ8B2313056.