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 0x93575a77b733918499ce82d4a667bfe69f2e4ca84583697833fff80b5e043f96. 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/564fb956-cc9c-4eca-9ed6-d1234d137005.json and https://artists.proofprofile.net/proofs/artist/564fb956-cc9c-4eca-9ed6-d1234d137005.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 0xd353823fc33c58650f35abdc633d5ab2f25630c8790ef1b380caa03997f8fc6a. 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/QZK6K2294804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac414546b17725d9e058b9e7d5fa2682496208d86f765ecf7b7c18852dfb6c68. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6F2297212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40079796760b5ca8e5c2abfa4d0d380aa6c30c0522bfbbae062d892015923413. 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/QZTB92295653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82ffa7a122a9a80137f662d9637ec0554af6ea7ee346528bf21389c59040c77. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN92359295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609e04de7fc1c4ee92f1ae2626f688d4f7a84572bf999bfd9d636843d3139f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN92359296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ea4b3d66c4cd3c70b2720446fa701b9e843bcf4dee61588ceac1f8dfcbe18d. 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/QZHN92359297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41cc7b3f29b52d521d66c39d150c8601991936b3e2a6266b08376ea2355c17. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN92359299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54afce0d431c90f2ffb48e389218a58e846858aa5420c548682ce5f9f6cdbd1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USUYG1516837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca9ec0633b270e5492900e41d44c6b9cd5ced8a2bdd6c34b390eb99ca7fb978. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1516839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36be8efd2f59d2daf0cf84c097837e4c78724b64471013d3fea4df6e764efff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USUYG1516840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97006362cf3cf039a3aa235a3096a85e783df8fbdbf0d2f2ca63aa4e38cce970. 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/USUYG1516841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb8f158bce3f196355faebe39faa39a649457bb10d201592c9a983be4e86eb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/USUYG1516842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd198681e4f8ef8f8a87f287d2caa12228fdb81477290acaa701f129640ac5573. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USUYG1516843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47975f8a752ab553f625655675a2dfb02683faf968a8f4d0194fdc9577b13022. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1516845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa2d2fdd5dbb86e276aff547e8d07c78705ad2b819e2d24692b61bef4998f8. 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/USUYG1570111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877dba8b8b71d0b7fe8d52cfca8830836cf14d46f2b82c05b77bc76b1729133e. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USUYG1577935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b348f1265bc74ad534238f31f33e71213bd793669dc49291997fe73bd42d08. 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/USUYG1724127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfeb1110aff1af44fe3329e29add8a3b980204d390fee08cfe3c8c5cc88d8c9. 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/USUYG1713315.