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 0x37544275a59ea1ea7904fa19cc218a52536b1193499a2e12240eb841db4210ec. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2357e448-f23c-4d40-baa5-d5155ea51a7f.json and https://artists.proofprofile.net/proofs/artist/2357e448-f23c-4d40-baa5-d5155ea51a7f.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 0x2623191f2eb49fe46176fc5733160c96adca9feb7e1477708c5526e22e860545. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZ5FN2444289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e4f6a98371bcdca015ffa4f41d78b5ea744d114602e30b3c4f2e2aa1f7a2d7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USLZJ2438371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e8c4b76ec1cade7d67ed2e1093c20955e1cb0007559226e12de193026c673. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:16:39Z), 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/USLZJ2438379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af79552c9c30e3850174899599e7a0d9c902f942fa48af36430cbdca76bd69c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:07Z), 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/USLZJ2438387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b9e7b5c6ddf4911e89d1dea34ee29540f61ebaf754b806e0760f77e457d5d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:23Z), 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/USLZJ2465690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cc94d276e6ddc4f7a0eca1aa4953292b8de4fc31a2f2f2bb8a538199d89c9e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USLZJ2468843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbdcee667fc42e74f376ffc1568fe97b70f2fbbdc09946ca439e04c1494c943. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USLZJ2489345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0343e09eb0fe0d031080f03af188dc53c6c5171aa2a8a4418fab3dedc790e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:06Z), 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/GBRKQ2416622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a70ec0464b9fe93bde1d0cc9c424645df7e6e6130aba160d0072d9bab508b7f. 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/GBRKQ2424270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5bf186bf2aec38c2b1d0b5e58295d70df117b1ff6d09a8b1a1e9f6c0f8930b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBRKQ2428176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a310a460d3243b0c62599bced6ba2609d23146908d101a0cb87c47b2c94bffa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBRKQ2453659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266947d97a85433d2bc2ce15d7a094e5fcf8b897a4277eaabc480c23d2ecdf83. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBRKQ2459398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0585b69b934b1e2f2581d4dc10730a23ee72796282f13485b7df67619d210. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:06:07Z), 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/GBRKQ2472380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41516a118f4b172cf180845b1edf3206c556ebccc39ec2e4d63849cb874a2416. 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/GBWUL2433835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec68c26e75578a4ca4e8a239b91a69eb23d8631d68c9baf0796e402d90d36a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBWUL2464592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea1aca8fa6573cce85c8a162160ea26316ac24ef35342c70561cb774ae53cf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:18Z), 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/GBWUL2472433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57681d9d4a7aaec891282631dff976c9ef4ae46f1cb97c92d8864131ca36029c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:49Z), 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/QZTRX2428339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbb276a36bef8e71f5d9b888f6eb68b5f587c36331ce1bdeabdda7883ca4d48. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTRX2454300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414ec187c6fc3b7021c4fe422cda3eb060e2b24f33afab068bbe91b25a8b769. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTV32422671.