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 0x3aa20afbe65bd102eb542b80e5c336b7685fca7037c11c42d74bf477e5aeadd7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3bbce2-3b69-4092-8b82-3729bc0f5915.json and https://artists.proofprofile.net/proofs/artist/ba3bbce2-3b69-4092-8b82-3729bc0f5915.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dangerhouse Complete Singles Collected 1977-1979
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 0xede5d60983cf38db7c799440e44ec670ace34140e28245c6ead3d43c705b5777. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA6P1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c25910deb107c99b71b13fa208db80b351b85fcf6c009f7d3c0b25a46fb011. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24920eff7958887c4e1403c878d220a83e00274088543e35ff402031ca1e33a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA6P1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cdcb68b5d4e021f02dc86c64f67ca8d2ba586eae94b68bea229f720354b8a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca2b0b896aae549a5e9121bedd380f478b843c726ed7f7e89091ae196244dc8. 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/USA6P1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28285af725e48b2ae5556c87139fdc997bafc1347859c6d26d685203d7ae37e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA6P1500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f2c4c14c2ec6c76984e75b5b1b8f83bef13c53bdae73bd1d26782ee0ad1b21. 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/USA6P1500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd9736e15755f7c3c333a6f4c60bf0231fdcb9c499e5e196322ee34ee85918f. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/USA6P1500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24503de14a8a765710aed7c22485d0944928fba3fab1c70662ca0d20b89799c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aade4a9f281807824e3854232aa38b3950adee31d43cb64fb85dac07a3c2e4. 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/USA6P1500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77411b4b63401f190d31a7185eacddd9ef691154412d252790873a05be3643ac. 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/USA6P1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf90b3fd6b19073c66a457cf3dbba473cef269e73d703b5329b0549c6ddf9d0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c3d8ca2ea7442085f7aca879d58e3daabbc5c5d44ea02dd88928616b091503. 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/USA6P1500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d0127748f70e9a943b6a89b216f9be1bc89bf3d7a4ed3737cfb6d7d724c083. 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/USA6P1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df0941b2aceb1de5615254582a62fc32507988a75bc55af337891ae657b0d6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2987b0f912e348d72d3c168aaf30505c7f22583d00501149931c1a12e36dfc74. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA6P1500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3650d8c34d29f32cb9ceeae37c9263cc82cbbe778de98b75d0a45526c2d75002. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/USA6P1500035.
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 0xc35a49007af2de83d9126ff2bdf0b49bf6bb95d0ec37244226d81cca28f73354. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA6P1500036.