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 0xa0ac1aa1f23414b7463fe158561e2e14bcdf6de5ba1aeb25858122525feeb860. 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/3085d496-8d11-48f8-ae32-bea1aacd8691.json and https://artists.proofprofile.net/proofs/artist/3085d496-8d11-48f8-ae32-bea1aacd8691.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 0xc0a719c0704c77f64dc63c0b374b95b7a8ec86395642851aedb76ae4c5f51075. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPYN2380969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34832079dbfd09c6b23713e022d331d60c5858b1ca0eab02d6faf84b06d20f65. 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/QZNJZ2491857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e6490f5f3019600f6d68e5645425ee36aeaa5cbd1f7696adc22dff85c203fa. 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/QZQAY2462331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c8ba9d36982c7864e98813e86d4db7298ece7e5c12001ce408b41cafa90198. 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/QZNJV2409789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9355091dfc3f6a0183988984ae938b14a2360099bf5a5e99936d8765ddcce4. 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/QZPYN2465867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c74f9f94fed8fd765e7264166071d77f0bd2bc861c542ff4a825f71eb7d84d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBRKQ2404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a8fff3a980b5a85b5270009a87af7ef7de1c27667dcb2970876d851bdd75df. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2467167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ea68eb9dbb992d8ce4a15c43afb72cd1006cce31f184f38bb230ce70c1c49. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZNJX2248104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b12cffd7b207a822809edb82615b864b0f1fdb6396b45dc23700af1528f755. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBLFP2464914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01968e18e24f941a07bac8dcacac3d81ce8d870227d5e681612ccedcafd0db10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2440706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82823a41b5924bae63245292ab78a4f425298de1f42dcaedc3d734acaaee8bf. 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/QZGLM2406195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a7484bf057d06db4393034bb449fba2b585c4d3b0cadab28c22dc24afaeecc. 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/QZ5AB2482207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294a570f9af4e5f66a50a635ae79ff304627c17aa1f5e29cff000456756251d9. 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/QZ5AB2482205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58db6ea7a2dd37f8edc299c0cdb6089912463cb96a3c58bee68095ba701689ed. 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/QM4TW2456624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d31c96ba1b4ccf9a27e590a1b4fdafc5683d8ea2e89c497d8c5db34864168f7. 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/UK43Q2428894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98bc5634687df6eb376685b191efa7b63f19538bab6b36889cb0dba2daecaf. 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/QZ5FN2470114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa86b61418ef752f710e14cda933fd85be21a9959a57c01c965d4455cf9c5061. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2470138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a425c49ac68964fd0d29253c116605e7612d1d48ed2b32c3eba120e27ff4a7e. 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/CARGL2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41adebb9d817700ba8bca14ca6c3e07fd6900764ed893d77f7bd2e9633e65bc5. 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/US7VG2438577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119b03041554085e76d8b0c0c2451fb76b038c88d11daf10df54954825afc950. 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/QMFMG2338214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12093505831574e372b483db959c345db4cef3d7a7665c7818f655fd5e927f9d. 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/QZW9L2339535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0178d412ada74dd03786985bf1bfb6109e1e7e135b1f1af2c3fcb135506b5ca9. 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/QZW9L2305643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b0e3ce5bad273f29dddb0c89095dfe687623185596469b464c4bfe040f9ad. 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/QZTPX2392701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965070b7bb3ea5473a384aab535d74f8a9a1190a3f4ea4458b3d74e97cdf6542. 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/QZTV32351809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298ca3b9c0309ef5316646fe580e40c0f5b4cc8f6a8d3d288c80f335ed6c8e90. 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/QZNJZ2389953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1371ea27fb1768096b42b31f0c0989ae72c01731cec6e7e553e315778ac1617. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJZ2389940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca483c938a7f6591b87affb053d0551c861a98b28435001f4e3c7dddf36ea49. 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/QZNJZ2362058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acdb348646de60187ab111f32f31348cf03075f84ce882a3e05f3c9e24ac2b8. 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/QZNJZ2317611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c4ce00317a46dc1489acafcf9f5523dec92a65a4d92f80782a580703ffa6a. 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/QZNJX2303824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f0101f8f3bdcc7e9f03ac17cac769ac0b609709d4fbd641ce20373e1785595. 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/QZNJW2356945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafc9600891dc64ffc25185b2f065b5e94b056c729a692b097db34756d4060ac. 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/QM6P42377801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc323cb1f4085f016cc80faa3901d5a92d34f1ceca07eda75745bd7e1e21c06bb. 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/GBLFP2323276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20168ea1b95e5c426167100f7e6633d557a187d09ce1620508e2e99e50ca13da. 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/QZNJW2321935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d6b84fdfd079766a83a5f0621519d95ea5fe7796926c616105bbfae790988e. 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/QZNJV2376775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bd5c8ae9970480556f45d27a3c07f1e660a7d781f0135d36cdbaa6f26dccee. 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/QZPYN2364968.