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 0x636bf09ab4f6f14cb7532351d6c317884e22bc686a17352eec94d4cade04e2e2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76529e35-56a2-4b35-9321-b9d5cd7989b3.json and https://artists.proofprofile.net/proofs/artist/76529e35-56a2-4b35-9321-b9d5cd7989b3.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 0x1cad2eacfb012fe0741b5c2964201af917cb33553a166d3a12e7bbe2201183b2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ8B2324943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa337f9fcb7b46bf8440bc09a64ca5fb16f5b539ef5e33ce9d7202eeb8fa2631e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ8B2324945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61967de03befc030f7e36a1084010cb6dc09f90e4db1b4e3d2a3609599ed2beb. 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/QZZ8B2324948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28028d0b7b6cad3fe81b622b9576bd67a989e05125a9eb38c5d73811e85eaa62. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ8B2311072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c15cf4a3438a4cf79155cb76f0891968e594b99cc76d683823e1742747b2d6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZZ8B2324952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d372b6c1d914a82584da31f9bbeea7594bb576196ed1a81b0491800eda6f8a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ8B2324953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f476089c8ad7eec8932f43a581f2170753837e0a01fb2730083bbc2b4c447e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZZ8B2324956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0abdfeee9ae6c6bc83af1a28477e6308b13501682e601be4cc6c99e09ed1cd. 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/QZZ8B2344660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad136806c79705278c8286062171d5c09a78dc89bcb17f02a30c452cb80cdd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZZ8B2344948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef82d388d2ba8ff92d8c07d2b21e9a4f5049ff69791874050cc8e2e58837d47. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ8B2344951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0abdfeee9ae6c6bc83af1a28477e6308b13501682e601be4cc6c99e09ed1cd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ8B2344660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66496d1fcc5a466c058ebd99956054f08f8716c17c2b95edea6c8776cbb335d0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ8B2344953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdb4976ff733997fac4ad083ae17b786dac1aac333686dc46aa2542703dde6c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ8B2344959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2e486cd5f881173c529f061b13ca4a884ffbc0bc30566fd731a3a570642da. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ8B2466298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58163a6382132ed5050b5fdaeb0c2dfd3ce05191d3c9dac2062297f8d882717. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZZ8B2466299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b819ceda7e2ed2797e92d4669e29ab7ac2abb198b2b49456699930f2efed8b. 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/QZZ8B2466302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638b889a9c76787e9c227b3f4cf00c31050ce4faccf0a4ea4d61f648686f280f. 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/QZZ8B2466306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518579c21a9660f471873cbbc7111e5515300ebbf2c06532444935489dab1225. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:15Z), 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/QZZ8B2466307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4920eac8d182388ecc79749b631703d80b2d22c2f0aaa7fde67e2bbdeb5d623f. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZZ8B2466308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ca613267e48abe0b5608a28393c33b0c7a07a8329460feb303d6ffd3958845. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:29Z), 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/QZZ8B2466309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbe6e09b41f7c933d3d0db443abf7f3d3f847ea69941692773155a627d8256. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZZ8B2466312.