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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cab3bb04fecfb40049ffbf9ea7d97c03ff48a6165ed273d7021f4fab9794ca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58be1b9f-6712-4623-b4a9-a9e85822d16c.json and https://artists.proofprofile.net/proofs/artist/58be1b9f-6712-4623-b4a9-a9e85822d16c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650697d1fffa00d187d589618a2cb892c8f677f9be350810ed9fcab4838f5ee8. 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/AUBEC2535893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f002c1c67f1ae812c0d01091122c4389cc4b3e364f19227429c71efd4387ffd. 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/AUBEC2535894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ccbc4e08fb3c8b9076dc7f7991b84eaa7a53ad49d5c64ddacd18795b8f1e9e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/AUBEC2535895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686261bde68953515488204eb7108e576370c3e9031614fd4b74f57ace4b284. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/AUBEC2535896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d68ad7769572a1c0e20b65dc433db65561a1de3f74bf3818252552307a89c1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUBEC2535909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7b4d2a8db105a267512f20eaba352dc0583da14da52791624608108dfdbff4. 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/AUBEC2535910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eb6c4c093ccd93d06d7022280d8e9b568f3ffc94024962719eb9c5cd3b1127. 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/AUBEC2538008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ddc00dbe43de47c43dcfe5876121f66feed8c592e5f85f84f11d65c30de345. 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/AUBEC2538011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ff925d49567d797b4f518dce37bf700460907e8b53706aa2a50a977fb8e4d. 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/AUBEC2538012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d042ba08b2d0db22f5afe8bde99c15f85c840e9fc279d95cbece15a6de59368. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/AUBEC2538013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7be8bf8c09b20b9a16031837708aefee79e819ec914e7147e3bfd641f40229. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AUBEC2538017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698fe6dc6c88a38c906958af0b866a1640075ea226d506c10da4ca4cba205e56. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/AUBEC2538018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a66f7e6e121b6e6365ab76bb1cdc8a684743812b1cbe22f15fae39d48ce8d9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUBEC2538024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee947933561c217a05588052f15175773beb2c3fc17733087dce900453d2df. 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/AUBEC2539051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c63cc2b77c459bfdce6930aa3050e995b7a04930217642ee771fcb8b68b822. 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/AUBEC2539059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5559406151740d60fd014f0fec91467fd70e6d956fd79b0a9150b79c07176649. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUBEC2539066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0da75c9a6d9004dd6bb1a24d0224a69270c0fb7c1ca46ceda0fb2430bbdff2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUBEC2542584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30d05b7cc1a9a7a7ffe0670c5e01e558e1a065645d4dd964f89581c7388e38. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUBEC2543888.