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 0x9ab36e484b47278ffb7fe06b24cc2f7dfa5e7968f3730dfc25c880d59aeb81bc. 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/51160153-b2f8-46c6-a8db-de62b511da61.json and https://artists.proofprofile.net/proofs/artist/51160153-b2f8-46c6-a8db-de62b511da61.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Flight from the City - Víkingur Ólafsson Rework
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 0x06d389bcc32822b7d989f505fb1628bcc53abbdd5adb6e780edd46c21c28d21c. 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/DEN961803350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428794bddbae06290890ecc2c5bea038d4fe93107ab9b12b39dc4acdd0e9d24f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN961500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec2f91c7832a1bdc19f127fc9fa6106a277d1ce4192d5e5390a33454e52eca6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN962238017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee4026ab71c23a9eb9871d8443128b82ba4113afb502b49998631c0f816b10c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN961500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1612c58350c4fc6c66adb8261f02b51d9eb910326a74b8c9669f100b8792a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN961630001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073d44e08fa25be1a0ae8053106d4b4c36f03a65e7660160e8e9709183decff8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664e1c2ded896c73fcfa87f4fc598397e6edae2887e63a5e847f95e61ca5c60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN962238005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8aed261f888d9af8fc8b67cf79f1b29af9dd0b2a05cc993bcccacaa3b229f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b040e67b2da25f306878603d1b19f513cdce022fddc7d3bb331703f794aad2. 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/DEN962238007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21828138d2c111ce8aa47b8918f9f8bddcdbd85b4ec841dc0103ff7ef6d094c3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff214f105e7d6e090bda5cb40495cdc1948f24dea25afdf6eb364f2d630664ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f1d64dfdeca2e48f7a9ae8136bb2737f8ee17a1d636945f8e9d3306bd82457. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN962238010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472095ea06b3fac8cabf260e7b71417847277f48d9b87894f7d4a6eb9d384c32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf953e003f8acf153e27555ae928fe557a052a9730d302755243554ddb28a9645. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962238012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23b0d77ee6d44f1b44bef62978e7829e610d3f70dce10d10c23aeee00f7ae6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEN961500386.
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