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 0xdf59271e2fc2ca2744a957b15a9e93e182a33413e62a85fcf9f44fc51a179cb8. 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/a8abfd14-d772-45e9-863e-7b4ac687bd6f.json and https://artists.proofprofile.net/proofs/artist/a8abfd14-d772-45e9-863e-7b4ac687bd6f.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 0xf37a2eb57da8256738611d9691f24ee53c9bcf305fe90312f3cc22bd86764b40. 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/FR78Z0800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38339350e3833dc3e8de5131d269b6c38298cdd2b1549146bcf6144ade72d3d1. 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/FR78Z0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515b92cd197aa2b464db645c98003e9a7f28f04500e904030d4a1caadf110750. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FR78Z0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6a31b30e5ec69dc126a026df667fed6b65cf8ac1d4ff8747230b47e11e4c5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR78Z1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46954b66bf56b152fb055ef6bff16ea03e796fa4cd810e2844e0135bf395854a. 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/FR78Z1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76ba35240584fc43d6a6f850a83489497e15dd681138d5dbd15dd1ac663299f. 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/FR78Z1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe9df14baa4bd7c81cde31544b1daee5d8476dfd7e5e7652be15b735586f4b2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR78Z1000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58430b0ed39f9e32c0fce354e7b6c8ccb6d32e67ae39e3e8c6086ee0c653b84d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:42:51Z), 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/FR78Z1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401b1212052b887db98e039d49135043fb104a59fd7d934992a0aa72fc973ec4. 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/FR78Z1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30859b11ae881b5a8779b01fed4bebb469bb45072b3f023ab746e1b63468ebf. 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/FR78Z1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce890e4e55fe1a151a09bd85f79f4fce25ac574c7ced585ece3414c1c000f64. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRZ141136010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db95de704c14594e71fbba63f3f4aab1cfd6c6a707d9ebc969840483af7a24. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRZ141136030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d8bb6142a2e0b1eb54546a676e32fc0f74c6fa0b314cf2cfb6fc2da910591. 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/FRZ141136040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c45975a4f2ee5e42e87523c3902cb4364d8c57aa357118de3f9dbddf70aaf9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:27:39Z), 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/FRZ141136050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3401da22dad9d5e240813c1cb672b24a9a35e3ca11eab37efa8feca9fdcfb47. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRZ141136060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92396a52f176a1db8a74b91afd8b8c1a7a0effae17048e79546dff86ad48423f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRZ141136070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99a143c0d3750932d12893ec68cda1a5abecf652845d754259481cbfd32a9fc. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FRZ141136110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffc876be154655971747601280c21336f7785025fc1090e987f616b7f6e3784. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBGRJ1700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6df87701b0896198320e47923b56daa863c26b5ff4b3ee5f4b81405fc65878. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DECQ11502803.