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 0x018c6ba2fb8d6e0680cc9631ab3d35fdd3621034bf9a8f3ac5ce1f12a8058305. 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/0c05f6ec-8b25-4f30-bded-53737f85802f.json and https://artists.proofprofile.net/proofs/artist/0c05f6ec-8b25-4f30-bded-53737f85802f.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 0x162182aa0fd827b1206cc88ee45b092f275a6c679e0e463d468d236ed5cf99e1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/IDA171085001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dc45bf0f31f63d20a2ade125c466de756cd368eb0fd8ca4d439f7fc6dd672d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/IDA171085002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313a352f4d1e7e849ef0bcc8cfb0ec4347b5797863f3f62f378bd1c30b59dc1. 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/IDA171185003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dff66164c5b06a40ef4f35fe27535dd3a74cf49b429a22146d1fb4f159505d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/IDA171185002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb42a2edbc7ba21405103f1fc53095ae0c006ffa6404728e5c9fee1334bf5ae. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IDA171085004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162182aa0fd827b1206cc88ee45b092f275a6c679e0e463d468d236ed5cf99e1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/IDA171085001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dc45bf0f31f63d20a2ade125c466de756cd368eb0fd8ca4d439f7fc6dd672d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/IDA171085002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ff572acb8e64e21625c8c108d0b15396e32dc858abce8fe730206da4e6ed52. 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/IDA171085003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb42a2edbc7ba21405103f1fc53095ae0c006ffa6404728e5c9fee1334bf5ae. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/IDA171085004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5049e133c7b32bf07563c8b5f791fa13722bea09bde3222a8582d4c85971a7d8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/IDA171085009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bc063be635caf588dc561e00bf1f548530d15305ba1f8c34b7427db80e251d. 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/IDA171085010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e972a8d2f9e0f11d417f698c16bbdec6b0880abc9e110fa775b9881aaaf50. 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/IDA171085011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c412380b456ffbc20caf83189fffb7b027fd64af1a8a8e7f6d9d4dc9cb6278. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/IDA171185001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dff66164c5b06a40ef4f35fe27535dd3a74cf49b429a22146d1fb4f159505d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IDA171185002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313a352f4d1e7e849ef0bcc8cfb0ec4347b5797863f3f62f378bd1c30b59dc1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/IDA171185003.