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 0x676134af472de1b590003a12c0e57f2b5670819092db30dc3fea151f1958d69d. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b13dc2f-318b-4614-8710-d1261bbe9c4e.json and https://artists.proofprofile.net/proofs/artist/2b13dc2f-318b-4614-8710-d1261bbe9c4e.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 0x0b7799e136c6a48bcf45abbafcfa3243862443417becdad139cf5f5d32be5327. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DETV11500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d61ce81305fb0e2a1602ecfc66d4011cf4947d5a68d0f8cc603f9eff9c85145. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DETV11500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69edbdd693aa08e6523c580fc4baa8e0b3590acc66f2c32fa794ceb1916a7f4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETV11500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3cd831c43fdbe0a3c37cd717ce6bb0b3d481647cbb526455e9de6f177ad3e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DETV11500479.
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 0x3a07ff9c7831b0f6a4f04cfd5d98aaee325a8397a81d26aed25471a2111fede5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETV11500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c4f6b3ac5e3e2a3372d8647c2bad310b4b502d7c063fc5f1f2c603801c2071. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETV11500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bc6aeb7ecfa97bd41a15b6c2327e0c29ff0d89a9465af6b39eadfee93dbfa0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DETV11500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dac3725215e9f51f8488d680c40b01c6e34b89efae280fdc47a7d341c197b64. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DETV11500586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fba5c045b726f8270d43eba3f93a29e653d4f53c5881eda4c5c56eec585faf3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DETV11500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149fb56fc51b6da793894b59031d27f3292d2d81f6472e3ad3b1450a305f43f2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DETV11500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e78504c61070fbb7965e84e6c40437c95056c50654cb6ae1e79be804c0cf465. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DETV11500585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2191e6c76451e7a6503d27abca9f76d9a2308b5f1d67264395c16f1521082e76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DETV11500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd557aefd3577765b9432cbcef4bf8eef5b6686cf126fd4cfa278ede3e23647b3. 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/DETV11500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3200822be850f7c56a541973980b8f6434bee3da1906c811fa672e87d46d8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DETV11500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b1858d1cc6cae1642b5c2a769645e6e436a23a66428e66f0e5d372c80d049. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DETV11500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8f2390d82d5b30f406a84c798c3f393af5661f4ec166c6192effc6571eb59. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DETV11500514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cb454932f56594fffcb1549c5634b0db3d881b3404443292a457cc4b6a907d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DETV11500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ece3d5a722130120c46e3ec832c97045211a797c08228d188cefeba4d686b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DETV11500521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8188388aaf9f7bde48688349ff790950ed43caa22d18398b9e5f30bf24151ae. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DETV11500524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3e1c34b99fa393b048570b999b1b1f4daac47375cd43d315f956c14f6a52d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DETV11500532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65531110a99f4a5b7bc9fae72773551ffecabbbc4c5a49aa2f072101c032925. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DETV11500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b4c0d1a6de93c9b695417aafe8275873b4b03796c6a2c34e62d48426369b2b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DETV11500523.