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 0x6a138ae42ca627a8dce20df13688e351a6db4c83b9a42705955200ebbaf0615a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9b216bf-7ea3-493d-80e9-5af0a1995c9a.json and https://artists.proofprofile.net/proofs/artist/d9b216bf-7ea3-493d-80e9-5af0a1995c9a.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 0x64c3ef7293aa757979da0bbe8e29395ceed329a4a16d4cf32a7d2c915a35f9eb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA72537681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59969ec7317f4798c0b967fc0190245b212bf11eb9d7bdea36ff10cbb2137ad0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZDA72537684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e3072caa6020afe59c37295faf149ac5c2b55300fa4b73f71fe10abbaa42b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA72537686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b4875d1bc838582e59cbd0aba62df25993ec83561d444487c5849d24f68fdf. 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/QZDA72537692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900e01fd67d50d469aa7db0551ae814355cc15a45158fdc5f86758d777f22d9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA72537693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e77edc5b043ec4f7e32ea5776245ed02e9cccb64bb0ac3bc4f80ffa1292a8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZDA72537696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b744ba4915be70726efdb82ae45bcfde8a94ff7618c05b6697571cce201f74. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:04Z), 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/QZDA72537698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eab10086322eee0e32ab40fc7487aad0feb1f10f754bdb41dd91a2337629e3. 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/QZDA72537703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5482eaba9a58505053efbabb88c885833e259d77c3fc6f19cda79f9ec6b8d508. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:49Z), 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/QZDA72537981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59666377bd48190dd3dbd41ccba7a4689b4a9e9a1ab4d380956003c55fed5ee5. 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/QZDA72537987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bba7bc2610c44fe78b2c0ceee364aff89239d3ed37f95845870903b6b4737ff. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA72537988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f2c1e0c0c56e8613b347ec46d94f985911a0a28224f6d9770077e98979d321. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA72537989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc486ac27fad47d6591bdf5745bcf6c38ec2fb21dbae880739ac2a0881a3fb654. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:43Z), 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/QZDA72537990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa695cc0e0522ab9345758db67c1edf2d61f5f7f21e33875d2206e7dd2259577. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:31Z), 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/QZDA72537991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd06432275c948f15cbf7649a402cb09e312d9cee5da9d752358fe6f7bb56c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:49:08Z), 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/QZDA72537992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b45a2f6ddb582b4d632689a7bbea03b05d557be0ae1e6c690649d2ba7bca1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:05Z), 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/QZDA72537994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa879002ee214d6140a433ab4ce271ef17dc0b9d6340b63a6695ade848cbcda5. 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/QZDA72537995.