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 0x33faed04d3d850f1dcb8e9b359c71db11e3fbe329512fee55c56194f91ddef16. 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/1e9dc0eb-cf54-4a2a-a999-6d39d799ab6d.json and https://artists.proofprofile.net/proofs/artist/1e9dc0eb-cf54-4a2a-a999-6d39d799ab6d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908efb8d3d453dd1b7e3fb6102f17fb19f87c5ee00de3ae0e2c834b5877f768. 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/QM8DG1973869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3770d71a8461184ef1f46598a901545fa68191750ee2b78330e0d1d86d869a6e. 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/QM8DG1973872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb481a2c1b0e069dfe098d1fe01d182afcd213f663d4dd1e12ef3fa3c24dc06. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHZD1954949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9772b74758ee3e4eb1a6c41659ab144cef8d99b50934d7a80da56d4d5c1331b9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHZD1954930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01824067a1a1577d1d127ac441d2aa59439a3df9768a3f132248b2465d01df58. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHZD1954941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec632ccb51a86bc2332fcee97276bb0322c7ce790fc6a5fa067b9a3b38a74086. 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/QZHZD1954945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb481a2c1b0e069dfe098d1fe01d182afcd213f663d4dd1e12ef3fa3c24dc06. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:36Z), 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/QZHZD1954949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7734143c0caa89cd3442650065f1fc6d0421b4c6a09627cca89f6404be7b4d08. 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/QZF8N2088247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c04654a62d2fd268fdb43bbdb7aa5ead5fa19bb4297788d94f8c4ec1184f9b2. 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/QZF8N2088255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40672284f1bdc42090175fe48d8dba5592ae110fe4b360504dd3b33eaf9a5700. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZF8N2088256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb1cd13e9c9c94cbb56574164f0c3b987a26f9a221f9077270dda6494590058. 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/FR26V2033366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f5fedb1751f2425d321fe66f0972714cf44ec59dd51425f02676372610e92. 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/FR26V2033367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a705a649017f9fccb0ff18ceee206c38a434412f37d96aeebd31a845c14ca73. 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/FR26V2033368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ae2890b531d239cf625a6f1b673df9bdcfa13221a709e3097b23e760d38f3. 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/FR26V2033369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf46ea06679ff237817281158b34b883468b128e09f11ad6cd62ade9b8629ff. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FXQ892500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff75cf2f1aa1b73f4b1620d380c69a2859df6c32586ca2eed86370b36a384ac3. 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/BEN582100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472472c2b3b0a779dff0660836331f4abf7820dcad38d8d927d2dd1a5d10ac41. 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/NLCK42408321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156a55f89870003851d9964b7363cf5cfbc305863b10217b64843cc6c2b37722. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK41045690.
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