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 0x6e0a9403d93a5079bb46291ee7f42d9b18544e9e011c1e1eca827cbea68ba5db. 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/cdacce8f-7a83-464a-8bb0-a4ee37dda800.json and https://artists.proofprofile.net/proofs/artist/cdacce8f-7a83-464a-8bb0-a4ee37dda800.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 0xc985c786bcdbe63ba40d3a769962c67d6b8750ae05ac6cd39c1b083c7235f7dd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRUM71901336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f0b9d75bde2b965a60f51328dd09a2b411ab31a4134b7719bca744e18e15b. 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/FRUM72000775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb579f14693fdb49457254dd13f9774b1bf3e72e473d62f4f3f54436e885c39. 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/FRUM72000576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ac693a0ca14da3c623f975bbe46ef8fe97da6636f1e2b69dad96f749f65c50. 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/FRUM72101095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4661cefc3ade38736054570738fa436d958c00ecc2374ecaea771871b293407. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRUM72101654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afa084a03a5df7e9cc9b0c178b1d4d7a88eed6f2e44e82680c0db9001950702. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRUM72101655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06090177b459d19afa4cce81660dd4aa85e20cc38603f6952be5a4b8659d790. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FRUM72101656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874f2eba3531bfdccecb9b94e961499253b85cb99b8e2062fac57fdc25002cf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRUM72101657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6c08dc463a2c3d3364973158c840a0e3f27b3db430d3a164579d87017da39c. 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/FRUM72101660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ff14e4ead15c19c5ea309411556fde10f59629e29f74df08f6680e2a87b2f. 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/FRUM72200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00567ed9bc5212e8db55879e55d3bd0662eb09b77c852919634e55c283b04940. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRUM72200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29ba7addc83608d47e5ec8671c1d8959e26bda7d66df027b39ddcb5a6ebe82. 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/FRUM72200409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53ff14e4ead15c19c5ea309411556fde10f59629e29f74df08f6680e2a87b2f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FRUM72200410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00567ed9bc5212e8db55879e55d3bd0662eb09b77c852919634e55c283b04940. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FRUM72200416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05effe428fbb43c82f1326cb73d43025cd36dee9a02f2ebaa065a6b95c245774. 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/FRUM72200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54093fabaff2ef3b5c39c8a8b669ece459f1a115b41d3dc56d4f259f5d9ca2b3. 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/FR9V02300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5d902013ffe95466435f5ec7a70c7d5c98652296ddc476cda315016bea124. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR9V02300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4254efa9facffaa86b2eb546df4333cc37c2993fa75663214b08165f603922e6. 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/FR9V02300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91988176a98da4faf0cb2223a424dcbc386f77670f4e343e5de2ff7c070de11. 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/FREXG2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d2dd153411620868a868dd549be326e720b8b0c0c5d7d1298f6bb2ddad6576. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12339172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7fc07e4ee23d0a742e9717c8a48cb3b7a3f8bf205f082c8d6671fca2ffdfb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12319413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d2dd153411620868a868dd549be326e720b8b0c0c5d7d1298f6bb2ddad6576. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12339172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cacaa17d6574d782c50995ad440533f74104ff0fd35e99432c22d0ee7ccec5a. 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/BEUM72400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ec1f53a96664a0d4809d4888b1d277bcaa0cc366254e0c8dd69d811cf051b3. 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/FRUM72100654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ec1f53a96664a0d4809d4888b1d277bcaa0cc366254e0c8dd69d811cf051b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRUM72100654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985c786bcdbe63ba40d3a769962c67d6b8750ae05ac6cd39c1b083c7235f7dd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FRUM71901336.