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 0xcdb4f30ee1dc9c7e564449216548360a71874c04eba92893f32e820305bcc98f. 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/5b0342cc-665f-4b57-8f69-47c2115c0043.json and https://artists.proofprofile.net/proofs/artist/5b0342cc-665f-4b57-8f69-47c2115c0043.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 0x5ee477479f9ccef7400dd3bc76867c6c21522be32f3fbdd6f67b02930c47aa9c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DELJ82000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec38703952da919c867fc358c5ac97a8c94a6b3af606c14afa7920835a5fdd3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DELJ82000343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc9f6afb60f694fbf0b5dd038924b41ae9d96c426b94139f195e908218f55b. 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/DECE72100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1c207358abf2e9621ec8439cb1e06313194dc74d24ecd9a7babf8132662387. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DECE72100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3e2ee45036d4c0a9c300b29b65f0c84bc7a9649592a6c2cbf48f4e4db51c5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DECE72100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cc9f6afb60f694fbf0b5dd038924b41ae9d96c426b94139f195e908218f55b. 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/DECE72100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd17f49b89450d4a5d48c0553742e9709eb34334427b646def60b1e0668c535. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DECE72006226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217d40e03bac26a339b0eb7863f43fc822cc0e0f20a316404580f052dc0a8bfe. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DECE72100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e83a4af0d8b4f30c12060dceb135a2a71be8e3cca8e29c8dd00acfe3be583. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DECE72202226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e83a4af0d8b4f30c12060dceb135a2a71be8e3cca8e29c8dd00acfe3be583. 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/DECE72202226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efef432a57e35b32f372c801c76f53d11c4df7298ca01559d676eb70486550b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DECE72202227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c0734294e4b766ff4400b86249c436bdcf801ed7861b2e185a824ec2b24066. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DECE72202228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e07f04bff53bdec48653104d1c4bc0cc7834c88e3d50f86c117800339d5fe67. 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/DECE72202229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0343cd4a459c3886c0bc270c2deb08021fc84107037cf693e86d33020dc0518c. 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/DEZC62328862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94f47a42aad1a7519f3802ecdbd851f7e4a092d4f2a0473e2a3cc0888a2d0d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62346366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3250aecf0036d1c580dafc8428224c3cb378f1c8e0e272af5d36987aca479. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DE1J42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bef73f01298f631b3e56618ba6eec9bfe2aa3819865c25f6c819bedb000b0b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DE1J42400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c90a7e661ae444f3d84a6616cd5e5654420dad6e608cb983aa0bae26c4a7d1c. 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/DE1AO2410385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4f6feb8230e8e523730667ab1776abc30a7fd3c09fa06a494f7cfb3e341d00. 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/USHR12345724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0c4d2b86c3e7e522831b3a7c78cd458d1a59c19f0a41f0c77acd944594e15. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIG2435503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423627b7c87373d6db7732e36c1c812933434ace143430557ad4416aa2628809. 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/DEXO22205715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dcc153542357202be5c2d439929974067f5dd4e275ac3816021cd5f1116322. 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/DEXK52100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20883b7635e722a5cea4bd564b9889ca25fe705a1d740a5664c68b1a78e6e3a3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEXK52300350.