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 0xbbbf9f4d9d777b15140c215fb4aff6ace4fa530f689cb7b84d6c15254ea15b70. 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/586556aa-8c3f-4565-abc7-f688813e35d2.json and https://artists.proofprofile.net/proofs/artist/586556aa-8c3f-4565-abc7-f688813e35d2.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 0x1c6105d7d7b0e408aad2dadf882cf615ee9f43a2eabca5c1bee6e63b10832816. 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/UKNRN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bccd54ff83d1b2f78672d9acff2dcc4b372b8f91933218cbd28000d6706b6. 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/UKNRN1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295da93ba50e34c95272a03497065de111111c4d7c3c5afb45fef2f636225077. 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/UKNRN1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d11e8f64ccae751f9abe6cb36f847d5df3b09ddb1dc894e5ba54b3873441bb6. 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/UKNRN1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d3ee5ddec2207e1a65bed78103a8c60930908427b9e1c0008417f67a63b5df. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:09Z), 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/UKNRN1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b375358fe562cc8dc33e4fb4b9633c0234496213a9f5daceed9dcbbc947fd4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKNRN1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146668a0de64e7ec26525478468b190764c2b21152af96571788b70decebe62d. 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/GBGDZ2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ffa9a600426b289bff3b829f7d17f4c349cf1742e7b59f01ec2b437043aad9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:01Z), 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/GBGDZ2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6539a81dff2f3331ab076d554ee9fd280b165d55e58e7c62a9c557bd78a36b18. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBGDZ2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa780aa94cff4e79948afe6433db395233cf8afab7e62ce2d33c85eb2abeec7b6. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/GBGDZ2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5117fde09c6b89ab920479fc35a9a71f1fe04033b3bcaa6713d1011fa5bb6ba. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GBGDZ2200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5217aa8f4f35f68ad60a66004ccc54ed5ffce2fcfa08f0376b44bf33ecd0a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBGDZ2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4febb82e1858015e7c0dc7ed8fb3e1e08715a71339cc990fd8990036bbc6601b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBGDZ2200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3525887d1985bffad970b9da3459703f8cca8cfaae3489276ab937658e8475c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2470480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11dbe266aba2705c19a7dd0422a48ae9eba0cd6539208cb2ae4b8f24570795. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBGDZ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f8a693352c6ce0e54671783f31d16c5894cffc0615e3fe7395b687361dfcd1. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/GBGDZ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11dbe266aba2705c19a7dd0422a48ae9eba0cd6539208cb2ae4b8f24570795. 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/GBGDZ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5071e0a5e2d7b55487fad33b678c0a646fdef93c276bd56a40187da3c58f75b5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBGDZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5071e0a5e2d7b55487fad33b678c0a646fdef93c276bd56a40187da3c58f75b5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBGDZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11dbe266aba2705c19a7dd0422a48ae9eba0cd6539208cb2ae4b8f24570795. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBGDZ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f8a693352c6ce0e54671783f31d16c5894cffc0615e3fe7395b687361dfcd1. 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/GBGDZ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739345080164457f8e6ddcd732fff507a4afd350fa4357aefca56227a357b999. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBGDZ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11dbe266aba2705c19a7dd0422a48ae9eba0cd6539208cb2ae4b8f24570795. 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/GBGDZ2400032.