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 0x6edd46a3b8973fcbc2b93ba85879da3f995625accf08c0dd9e3aaa19405ea327. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc9b403f-523c-4425-a92d-ed40cc12115c.json and https://artists.proofprofile.net/proofs/artist/bc9b403f-523c-4425-a92d-ed40cc12115c.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 0xc7fe8f5104cf4484e03d171a634eeabdba5395b8fbee661c95cf4a6be91600d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6N22103295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85368eda710013438cf437787401ec3b9b820854fe4055071c16e052087074. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QMDA72152291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fe8f5104cf4484e03d171a634eeabdba5395b8fbee661c95cf4a6be91600d8. 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/QM6N22103295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd70314e77ee576870853202550516b0ce78f68dad3159a3e6fa6b8bd66a7bb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QMDA72152311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061829a60a6e5a2a4e39b3bf526905c3957a870ff24e6597ce3670cef176bce6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMFME2141571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa721cfe2b018d980ec76d120ffe00d43353103ac8c1d97afba297637eddfed74. 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/QMDA72152347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d3a358aaeb35346dc41e288a93c537174cc88805d544bc66e2527809ceec83. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHF2300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f53c7ce2d9a9d5f663218ef18478560ebab69095ec4e56960f22573af81e1. 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/QMDA72327666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9168ea7d04e23387c2d3529436287281337fe5568f8bbacc847280b632ec1d. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QMDA72327667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9471aadf31d2353cea191bb5d4d331ca25fd68046329d5bae0b5859bb70ff5. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QMDA72327668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07926bece4da4dcc202b4e4332d1bf5ff34e109f13463ddb9614ffa1297c43. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMDA72327669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395cb593e7839385b22ffd33b2f6c37b42d16f6fce0c1232b41f2e14d2b7dfb4. 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/QMDA72327670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ba16b4c4c98c841010cd098ac491804f4a594282544aaea87b07d6fb2b662. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMDA72327671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428bded2007728e87853c7114e18c25ecfd8be17a177b52d1108c56b66016fca. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMDA72327672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1a9981dae3b54d1e66feab40651f2b84edc7d966fd86d07696d22daa9ca22. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMDA72327673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00091d871b55917ee85991c79a00aaaff8031708417579e4903519f528013d01. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMDA72327674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be9292f8e354036474d69f740e39812630efd36fb13ebab596b17fe2b908a14. 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/QMDA72327675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4f0e8bee80ee4bc1c7f8e85dbb852244943f9de39961ca5885dedf76ef9033. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMBZ92434722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31416de212c7855a19c4e5f636684090a3bb14e72f28fd78f07b13a560c1461. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ92434723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4f0e8bee80ee4bc1c7f8e85dbb852244943f9de39961ca5885dedf76ef9033. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMBZ92434722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383df51474b8b80b11bd24a100281ec2623f9ab94e11c336c369515fa7929609. 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/QM7282523977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7e10c99c219c5f058ba2672087e116875dd0d969b5daccf91f1c3e25cc3a59. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QM7282524799.