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 0x1a871b996a466ba41e1907752355ad054688a7348ca11df3d712c489b4862e88. 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/9338adb1-dd72-45d2-ad44-a464fefab7e0.json and https://artists.proofprofile.net/proofs/artist/9338adb1-dd72-45d2-ad44-a464fefab7e0.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 0x7f91a75daaa9a1671be9de0aacbf07431c5995fa559cd8483f036c6b8b4d96b5. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/DEA451207110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1111ff0d2521fdce3b9df83199f35d66fd2badf938c6b8b2e2cc00873417e2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEA451207120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a740a52bd920763018857c09eb3169214da7a90b408de634111affd28d94c6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEA451207130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab647b09e9828d3bce6d4ae9f560227b4c8f896efdbea453b62158791762fc2b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DEA451207140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724580727727179646dfeca71cc78ed2c80c5b14175f899a1d04b430f7472fc0. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEA451207150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5e1760470bec35a9b3aba061f1ce9d2624758986592aa0cc18e5c8a049988b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEA451207160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6954412b86d758fb68c2dc8ee371c46b41ca4ecf460b7e129a3b859c6ea2c65b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEA451207180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1ffd73cf1b79dc10c246f8f38cf567d3019423070ee6f3b3b3dea8473cfe78. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEA451207240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5ca9f2fe4a9335987cd677306f827285c37e6d91766569f61ef77764f6b132. 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/DEA451209050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb706cd3848218457ad863430876b64f61158c1d4fae1a431b234483561f0ac7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/DEA451209080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749ebdd75188db4c4448dda0c0c33d97896cde760ceab5c33a51f835e6df6b95. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEA451304410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925e686be86c5886d81d087971b4d25356cecc0c9083e5ea2769e5f226289d8. 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/DEA451304460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d568ed3b54085e1dac411a55eab0b002e77cb7c2d97b851f96c0a97e79d2ea6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEA451304480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1731e06bfc276e8655dc9e851ca3de522178047f797204b81f76c3c36ed610d. 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/DEA451505420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371ec6430cdfa79ad823fc769112efde6d9f85ad2f6f33573049c50814314351. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:30Z), 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/DEA451505430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb5d6217a4c6f8f1c28d9094e5fa16f3e7eeff87dbe5a34da773be09fe3dd5. 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/DES371700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad27e08815d7b6e28cbbdcbf1a242a86a13b3ec3a2156d5f1ffd0ef4246973. 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/DES371700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa4d11c71e40c8327e1a32ac46e0232ec48817b58dda1c96cb04060dd49790. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DES371700012.