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 0xb3614114212d63efba8a893c7abeb9eb20796d7bbd6c350d91c2cc61380c8814. 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/5de745a6-7520-46be-b303-079329f0e4df.json and https://artists.proofprofile.net/proofs/artist/5de745a6-7520-46be-b303-079329f0e4df.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 0x421c9a6accd0e6c897a320867979763bc6dc967e1d7b5a2001efdd31f25b3a69. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5FN2372313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0033150c2c886b936df384fba5aca2732a022b0e298e1792ffbc2f4104eebb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:57Z), 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/GBRKQ2375520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea5b5bd84f45b1980f352c41d3ca3d4bc2ec84fd21f5fa286cb30ea3b7dd3b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBRKQ2375522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1be552f9e488e89a633e11f04b6361755c7247d1db27f0a92aefb451f71cd7. 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/QZZ7M2444916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140e0f8f79b158dff5622b55c29f702bb6e5c2861ffac1e6867ba9336b5c377. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZN882543256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b1429848c8d6b5d2354f71f0a0d446da1af4530a60dcba270e15356120f148. 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/QZN882535277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b1429848c8d6b5d2354f71f0a0d446da1af4530a60dcba270e15356120f148. 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/QZN882535277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794ba7ebccac08238dda8767f729b7c198613aa210c0561457bbca4396a25504. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZN882584878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b1429848c8d6b5d2354f71f0a0d446da1af4530a60dcba270e15356120f148. 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/QZN882535277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e8dbb531297c4bdd4f3d4f5786948811f840cab035f77f3bba7428bec05b87. 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/QZN882584879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29585cbec6912a9b85b754487f39338b441a443b62dcc45389348298d1a0c7f1. 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/QZN882584880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cadf2e7a8ca8ba449d7ef1f88638f535261cbf646c994a88ebdc5ca41b83f9. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZN882584881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaabd7e5689c4f59bb8ec7100d7831efac78b584a1b43a6d5124e33be2a398da. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZN882584882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95da84ab5decda0972d0dfead82991730e81bb05885956b4effe354f71fd6423. 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/QZN882584883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5274a73db3139d8d455ac34e3dec04923a3992026d4f2672e9ee0e9e6de11. 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/QZN882584884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d180102ec968049cbc5dcfe8f386ad4b55d39a50fb782463fcd22aa2641b99. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZN882584885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5c806678dff017485e8588668804f029975d34583cd0b389e745692309db9b. 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/QZYFZ2512765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b2a6c8b398a580d1c9b263dde806c86d7cc168abddd4db858fe1e7e5ef5d7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USLZJ2567934.
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