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 0x4e2235787bb394408fb3da333cb30ab6750e06933e9a9008a25a82be930bf826. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44261355-ef1e-4362-8e7f-72b1e26e1484.json and https://artists.proofprofile.net/proofs/artist/44261355-ef1e-4362-8e7f-72b1e26e1484.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 0x07f4cfdc82005d0af223b2ddbd7e95dcdcaf4b64f6ead829b694980eb00d5976. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:57Z), 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/USHM21872761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98077c68b12e6ae4796b9692a6896ee1d0f4426b6bed550f96b61be43c6e70a3. 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/USHM21872762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2c8a1e568515048cedd11fc54c682b5e23e8f6a99d7fdec9dea1a38c08506. 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/USHM21872763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd6d323af7bbc8312d57473d7f92917db36c7d09045ac5e6eee98cdde23596b. 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/USHM21872767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07834dc1f1f522c936e0aeb82bfa8acc4646a9d7a5c5665ff5c9e9c1b69c7345. 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/USCGJ1944783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7193a91f8e06316015d5f73bd8efdf52292c9dc3b7ca7673365a44ded1f03e. 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/USCGJ1944784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bac1045688a130bebac0e27254de79a387b9b1ab21b57a2e7e077c0d398ee8. 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/USCGJ1944785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f491f1d5df038d1dca86d2f821f5f13f9a5134dd62f1c586b3b8f26d3becbb0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ1944786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046be61d371b48bdc9028aeed092032ff299fed8810a41fbd5c9f1b1ae92d04. 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/USCGJ1944787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de4c0e74cef2cc6d8bf249affe65401099b11974d66010a8e8c5e1391a8211. 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/USCGJ1944788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8918c7239ff15f96334bd9b23db70f0c02da9b7f55124930a3196a7d2c5f8e34. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:08:31Z), 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/USCGJ1944789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929a4ba521fa124b36cc751712cb634570cd17aa2e214530409fec4b93ff8fe. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM81922181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa7dc0d23bba28113e540dc7c7a54b71d4bf80eef9a5b1e1e29b5df9c50b3bc. 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/USHM81922184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675d5e05467d17fe454cd50dac557410c39c865ed4049302d31a1bf5b058c84a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:15:54Z), 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/USHM22108894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf091b9377a31cb5e83f1999bae7bf1b61d5adece370361e64ce19f366713db. 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/USHM22108895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b082992315f73c85504754964f0cc1a1017494d89468061f27ec94076d7fbc5. 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/USHM22108896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9bff23210aca81811e26965b7a19000afa589e947a7aa80c2b0f354ea9c9c7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:10:05Z), 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/USHM22108897.