upright=1.35|thumb|Kʼinich Kan Bahlam II (635–702) __NOTOC__ Year 702 (DCCII) was a common year starting on Sunday of the Julian calendar, the 702nd year of the Common Era (CE) and Anno Domini (AD) de
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 0xcb6aa81687938d5a04b18107908fae8b4e2d0d69d0d6a3905fd800b56cf00021. 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/ad41f62d-5237-4aec-901d-a03b877f3f5c.json and https://artists.proofprofile.net/proofs/artist/ad41f62d-5237-4aec-901d-a03b877f3f5c.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 0x473a01d4dfd66b6e1a24bb7948f63cb19af4a67f1831deb8c7cd33c8a1ec5c3a. 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/USMO19985022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7699bf7bcaee42922965a3c7ed81c3e858ad3a96bc5336e0cc44c1cb50267934. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USMO19985029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8332829b6fc93fe6c867f663b6b2643422189e7745c96df676a74ad4029bf97. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:38Z), 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/USMO19985030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41fc4cf35345abd802d7a6e4ed7dd64a8f617c60ceebab7be4c7b1ba4bc4253. 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/USMO10200807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a14642c30312bdecc84b11803613fe4587f9733f67d309c695ce9fe349ed73. 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/USMO10200802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4ceec9b7259c80d072806431fc830042807666bb435dc71fe182d1fc951ea7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USMO10200865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f437c40b22fd5a129268eafc3c392acd47231ed51f9492e88d2db6461fdfce. 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/USMO10200869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94515e293a9907fe8fb2e667e5952d459811e467c186a8fa2dd07d1a8518918. 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/USMO10200868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c359cccc1adefe39f28966dd9068a411aa0ef068156821c2edc8765d8fb428a. 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/USMO10200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49025c134f4a18035c153933f3db3faf97fc4efdeb720b444244a6d9c96d8d42. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:58Z), 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/USMO10200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc227fa0977156b354a27a648555cf83b2057d9df340a9b4645660926474bbbb4. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USMO10200866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eb09aea07f0f35feef391ddd40d2bffdfe82ade8d14bef346ac9d2bfdb4631. 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/USMO10200859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84aeaf9aacc9008671144284aefdc559ca5fc104c0f959fde13b7bb4e8dd41. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USMO10200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344aa8be5d4204a5f877926828552f67704c80044af77a4ea272f1188905f2fd. 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/USMO10200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b122e015a47cd0577f9ef7ffba058d72593a4f5c94352c75dfe7cad15f21c. 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/FR8GV1918570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0468643033ca63be429318fa980fac9ac22304cd6ee3a7ac8f1ca89a37eb4d3. 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/QZWFQ2373462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591aa9ea615a2c7ff12475fe819407dffeea379e140f27be0c1c056403bf568. 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/USMO19682942.