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 0x3857ddaa340c36b870d1f74e1859e3e08375d629d4b2c2cac54f0b05a13302c2. 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/46e86693-fb8a-4e44-a585-0a68b56a99e6.json and https://artists.proofprofile.net/proofs/artist/46e86693-fb8a-4e44-a585-0a68b56a99e6.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 0xede2f232e1fcfe58865f1d7358d3336842e3615e9fa1ca810d03debb5663dd06. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GB8KE2410086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1668a24906fc264fa521ddb7aa02d3b40d050e1ac03f2c6b1ff5c1b51cac645. 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/GB8KE2410976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d72acc734b021fe296faea81b3a23912b66946b891619e48733a9c66e13c9. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/GB8KE2410894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97346b329361a95bffe325264c1b026379a0ef6527e3d8051a377d4014c9b32. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GB8KE2417102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96350493f751565cb49b2d493c19452b0c7664a3c4fc91b44a4078ef2431335. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GB8KE2417103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1522b8ef17952829dabebec9e2af96d5f7f8f63f9f3913579b7e9839bfa605b. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GB8KE2417683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe41c77daef528d04f7ff8d248db4345b9eff278ecd6209e3a6fd5d04ed0fd5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GB8KE2417684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadd2a3d29ba181055c96beeda7a71f9de48602d0a2380da2af33c56c107bc5. 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/GB8KE2417687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eca9a4cdfda0128e03a65e22331abd632486297acf7ef32eb36d03e97f63dea. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GB8KE2417805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d549afa7b05f7f6e672909cf537e396e7a2f6a74b1d33c18cf260619ca7961. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GB8KE2417807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f32057f4ce1a1caf525271c2edee0009a74794a1bc3156f7c8dcdf0c87afdd. 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/GB8KE2417808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116472b44424771fc01484852f7789066d3b71d81032e58fc39a1afbbe9e3ff3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8KE2418068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883bbde6b3e0b58c3553a39a8750bc7aa012c67e2627d003b0557fb049b6c589. 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/GB8KE2418069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02e94946b3deb0c6ea01a1b02b2373bad02662f385b18de1a3d182be09344c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GB8KE2418070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406142b79539e9183a29d30ce59080c7b64e303aef61c60da9d0f2c9d1c58876. 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/GB8KE2418071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d99389a2e25ba317ed4e52584dbdd10c36121d9bc2c3cae178db89caf925e0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GB8KE2418074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205712341d2460184a4e86b5d22664e6d8c9074be6c03ffece535d7e45ac53f1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GB8KE2418076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc33aa3514fb6557217f4b4b0f082ad7c525f85df5169a1a4188cc386bd98a24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8KE2418323.