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 0x12cd577d52dc9d42e673a4896bb757559e23762faa2f0732999dfd04810b3d91. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a0a9726-ae65-4345-9a56-100149f5f827.json and https://artists.proofprofile.net/proofs/artist/4a0a9726-ae65-4345-9a56-100149f5f827.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 0x462620dbd88c55db0ffc42f0d425335d699baeeff8528a4af5354026dac0d20b. 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/AEA0Q2485387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4862a4c8b17a8de06bbfd4de8754af2e6fd8690378a9d181038a1998d3be8289. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:19:29Z), 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/AEA0Q2492008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa571116df39a28290e4b6fc79ef669f1016762fbf837c6711ee8a707cdfa129. 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/AEA2W2505279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd180863866a0fbebb885757040c052beee2a58472a4771eff5abb7e23fd85001. 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/AEA2W2515282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617eef73ac90a7e3300d159e9037ace868a8bdb0fdcf94e01ffbab2cc8fd5c94. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AEA2W2505423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628979fe593bd3b207d6150fc36f03ac3d5248a5879a6beb733bc419eef5d28b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AEA2W2515267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b28e4a63c4fdd5fd1486fa548eab6572d98a56a3396a8d994f62fb871323779. 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/AEA2W2505283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02406f298497c328fc62f64c3b19884271623ac65aac9a9db817d2e3325f01d1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA2W2512303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee984d3523ab8f2f70e95541c4dc86fa72090f9bae188daf0f9b7c9a710cf0a3. 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/AEA2W2512313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5bd6d7b5645d27a783630a2abc60009895b10bcc88959800cda5ebde4f5cff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2W2512900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eef52647375f9509ad1671fd43f5a976a3ae62800807a5cc8d82ca0cc39e47. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA2W2510385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273e1cf288b2f5b471742cb75001d3554c459cffa218fa5807228c86f858a46. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AEA2W2519322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f36a2d526807928ce74ebc3605c613467e6deeef35efebd1e504d5fa93a9f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AEA2W2519321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb592c5e4cfa3a28fab52063a0a085b63c41f3ac4063dde9dda801cb6a58b590. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/AEA2W2521237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3150f778e28c4457ea767dff03c8ef87aac96473f9e8b98d9940b1d3f1d08ab. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AEA2W2521239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f88105580375d91fb0428a1dee67406624b5c39ab9762f18a917f1c2ccc6e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2W2519326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f37c18dbbf958e9f4f2f4c2962436a007b3c8af07d6db5f1665c7bfe408516. 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/AEA2W2517468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e691ba3ba680f608e40ab3bcc952695044ca403efeaf65be678205d6c59a5a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2W2519328.