thumb|250px|Two Hours Traffic performing during the 2010 Winter Olympics in Whistler. Two Hours Traffic is a Canadian indie rock band, based in Charlottetown, Prince Edward Island. They are named afte
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 0x8eb7c437a1e6de7968df6cd1498fe75d18329a8c072461f14be1ff5b9c46c98b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f727ca5-6047-47bf-89db-934763f1c79d.json and https://artists.proofprofile.net/proofs/artist/9f727ca5-6047-47bf-89db-934763f1c79d.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 0x0226c5c0a61453b4989789c61c9b3aae4115858ce65f6da7129c0b879c7a48c5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAB470700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335bad147a4ba19b6764df092280a818daf47d318b69af7688069da50b7d2552. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/CAB470700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ba1a28e6f028398ec2fe2d24809e78faacb26fb3adf2ecbfba734f4c56910. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAB470700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba394f9c32829d672507a1e30ac5416a40f276dccf61ce4286e6a6b93861252. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CAB470700251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cf217955fe783b0961fd9cfe90ce86fcf1c41eeebce24bbe6bd91199303db. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CAB470700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40231f781f3dec4b446b488426702b2bff76bd727bdd60ee85fb61324e019bf7. 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/QMFMF2433148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efb4b3b57255d7155d2698ee5b23244eb0d136040595b9a33861b2c6818a02. 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/QM4TX2505436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb75985d271b44c26ccf1dae58dd4d88389a5f4964e30c8b3bc1b4619fb5d92. 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/CAT222480168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78efb4b3b57255d7155d2698ee5b23244eb0d136040595b9a33861b2c6818a02. 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/QM4TX2505436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74556992a3133e8a93ed55ea240ffd00e2c2485535ba7967a2c19121a1db9cf0. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM4TX2528244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec2f4979cf3ae5375d5b380b9b24ad69af245960d4034f691ad74ca6efba60. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM4TX2528365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4346f9b672af9c25fe5fa8ddbc2290d7e49e889fdd33bb6e66b06488baff5b3a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM4TX2528366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d4a78b8d0073ccfcc57d289c030bc1d2915c1d8cb7112d7779f8a13d9f22c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAD460610186.
Songs From The Gang - A Celebration Of Joel Plaskett
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb75985d271b44c26ccf1dae58dd4d88389a5f4964e30c8b3bc1b4619fb5d92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAT222480168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94a95d098ff2d4672098958418570e4e067c48eccdfd08563f3c9b985651ff0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USRZR1233909.