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 0x4e74054c8906959a61246141bf5367c6923b9a6442f5bea4042d257d1d7909f5. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/365ae622-d9d8-46d1-8bef-72ab98fbcde0.json and https://artists.proofprofile.net/proofs/artist/365ae622-d9d8-46d1-8bef-72ab98fbcde0.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 0x505914218b833a3fba07ee9fa496e25c01b2334993c2c0387b872d31fe9d0ced. 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/ATBK71201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102cdb81085c8e75491ad109f320a5cf1493cffa72d6b136a14354d87dcdefb0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATBK71201071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a026268786d2cc52f96d33ab1d19eac6b2fac537ef987d101ee49921f148ec. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ATBK71201072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe777c032439538a6b0c8a5f0663b80c9b800f0a6498b35f38ccd59488e7c6698. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATBK71201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61948f89a70ff303d633e2bd5bbb64f01d506f7bee69f88b76f849815cd944fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATBK71201078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d97e7693b279da270e4d42989a5a5986d7b017b80fb677680b4e73778fb62b5. 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/ATBK71201117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fa0ebb30f4ea50ea8e785ff488c3d013145227991ae8eacfb02253b3f1304b. 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/ATBK71201731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe776da55c262da18a6ec3d02813be7abee6d33669f8d240e93e534b33cf25a06. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/ATBK71201732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e28d48101add900912b17871729245247ccfef2bd7a04b9240055e48777671. 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/ATBK71201733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ebaa6c7156f298a6fdfc053f50ff1aa05a6830621b10027b4340e7ae40630d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ATBK71201734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3103f94f23b118c49139938a3e231d3a1fb2b1e673b4bcf44881d4891a273c5d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATBK71201735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8a2384cfa9f597132c05739615a617ac4e9b599fc779eabe364aea73fecfec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ATBK71201736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cd0d70fa9fd54b3c14cbab6572ef5168a61099cbfdfedb1fc74bb46802d46e. 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/ATBK71201737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a27f1b7be5f306b079a360f75ec09b0ba111faf1e368c3ff316c1ac7fa9df. 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/ATBK71201738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c053422d72b3263675a80827885ab2ac183c922367626ed89a2dd7789c9cb9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATBK71201739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45095c31924d20ea3593d7adffd8de53b1186f9e10e2f2bf6ec9c6a6ad304f8c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ATBK71201740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11101094c7306309f9ea39aa842dbbf10d98e376fc49a4289488d1ff69b9fc. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATBK71201743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f6b90fd219690db04e9b3115037e4bed00026a5801248b7f93cfcdf64666d2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATBK71201746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f302f512a747e1f3cf12d638e0e758b170c8e85ab58fde70e1dd4b2cc122ff. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ATBK71201747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3a6df87b971d03a2b96c520d9e49a07506cfcb22d41b357d8bb9cf6e8b632. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ATBK71201748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53c26282c7803b0afda2a8c3dafc4d0b207e364c661b3e4a968fe7243863ce3. 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/ATBK71201749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8f700040506ce89854726c3f58818f7a3e9cd833194af47d3ebfe8c3bb089. 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/ATBK71201750.