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 0x348b734dc245016ae4b9f8995433c0a04cb701a4ec4d7324530ae53ca442e79a. 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/e799f48a-1e06-4fcf-abba-0341a66f7fa8.json and https://artists.proofprofile.net/proofs/artist/e799f48a-1e06-4fcf-abba-0341a66f7fa8.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 0xdd7768641e0f0bccbc0d994ac42e871e5de796226bf1b7e2d5ce905fa58d1498. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GBLFP1666927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad477fb362214ad91f84fd17441263249c2f25076a57e42237e7bb03076a658. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBLFP1666945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b12d49f773c46fcea31dad26f71cbd68bbbf932b804d2a725393478b46fc2. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBLFP1667083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c24f128a3899bbce125ff8611bf7d19da956ac892143a550aaa641516dbf51. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBLFP1667028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f811cfbab9011f8b58a79a602591ff3ca8f9c8bf10604689dba0eaa557d2abf. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:54:39Z), 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/GBLFP1526249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5423abb1966c886ca98b9ae3118be35a68aa33c0d0c906f274e7c0c74328bb9d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:54Z), 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/GBLFP1526250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4ccace0405b5a8f2e57a402b19353e588e9349858c46d6474c808b47ca9737. 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/GBLFP1526239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc108bb71d29aab5ee9ca3a57d3cb1cae60b5fdb2c813a24e12ec9b30fb507e03. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLFP1560078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c81e91af3c9bde551a30218f9126f2f15fbb1c004f008a031b95e218e28809d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22080070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd76a680b7bf28948e6a374229e13c7d07a7e06296fc50b14c6e1602ae02de. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22080074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8642ef575bf184293f1024ecb096b213d47bbad4467faca453bb68942cbedb7b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM22080080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b961e875f9198d6726c56fe6f3a75b4ee12050106a35d6084d231f67b4303ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM22080081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6414b32cad0adb2d7cae1aade96306d44fd44e316a95d208fad76b7c5e344f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM22080071.
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 0x4c1b7ee7f21981cc56b6662b06106b5d305a2ae8d851f57a1596f9a344704caa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM22080072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a9ef03fd41d4eff9d82e03287ed4f11a6b3661fd35cd05a1c0f9a19e82e31. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22080073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ce0c9243169f98960f4442f2fd54306afd1fee64b66eec5a5a6f1bf3f178aa. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USHM22080075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d778107a6602962b1ab67bb4f006c26fdec6db1f2f538e31480ba59d2a946d6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM22080076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed50beb61db3a7beb92d20d1d48c9cfd10ddfca2765c045c8537c1f1b3cf4cd8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM22080079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f33b558a75f04f88806aba5a0ca794c850eb88ae0109e0b7efb1f4e5e5ca2f8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:12:12Z), 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/USL4R2046059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080accd72eb9e501f3b1ec20092e578616460b987d78c008e168c97c0ebb554b. 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/DEQ022111951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeff98ca795096616d1884aca6a6f6425167af7b95ee88adef7aa8889d88419. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121752157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de8e8e60b0a973e23b07b2c596b44f266d3477905decdbaa2a823e019723499. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEQ121746899.