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 0x90310c2e1b1e2790feb7cfdd7b110f89940edba406745e9e03793bb124ca36c3. 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/1b3394b3-2392-4cb6-8f88-1bd6e8e12c8d.json and https://artists.proofprofile.net/proofs/artist/1b3394b3-2392-4cb6-8f88-1bd6e8e12c8d.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 0x34b174bc936ab9a876c19beacac5d9062155aa6caa84e11dddcf443263bf80fc. 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/ES71G1912076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395de39f19d833dbebc608bcffad9e85028446e491101f2652bcd08825437f76. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ES71G1912078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4fe8a3957ec6f8af33d31fc02474c15ebad382dffd3f0d2853c2cb9ecb71e6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES71G1912079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258bacb4654713c05b64d8d934754ce5c63c0443a78ec9e1da43f3d3132487c2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES71G1912080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8129d5a63f3e501fdff4fbf12e1ae915d7752eaf0ccf4145a77a7077b20145fa. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES71G1912081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe2a0f1a248cbc1e17dc0adff3968d94e2d849abfb51a62b31a478c9c5c342e. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ES71G1912082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef9d759e3c838d146e22bbb90ea8edd8c51435b3ad5e503b85ec8e1d7a398f5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G1912491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6e5e5208448b323e670143014f4eed393756b326d55e2a41731b553fcae33b. 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/ES71G1912492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b355390a62832b3e2c3de27495017aa2d4166b72072190c6bee47b98c3efd11. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES71G1912496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4d6e83ca8c3b4286a6a40efb45c11322abacf8420f5d16435c2dff096bb7dd. 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/ES71G1912497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515d130ee542575cddbb8c005746a9522d412986b8cd64d2475fbe049ce3c52. 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/ES71G1912493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a08eeb5aa49d4e9384bdc2f1b660215a833783f6426923ffcec79e469d3a8d5. 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/ES71G2145990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa124abc2f458a76325248b1e0ff8df22b165bf5df7ec15bb0cb9aae6153729. 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/ES71G2145314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671dce2f9575d10bd2c03ec5c008a42143f3c21fbe9217c8841284fd43cc2c04. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G2142179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf24116dacc9c4624f53064d10e6861dd8445b3e6190adbb3f2421446f8d796. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QMFME2518509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa42e5f7bb13b1db9669f40ef43ca7836b2dbdb65c8d3ab89f3ed6aac89d7e. 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/QMFME2518536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc7b40745fed79519f4ac1f555098ae5e4a179d5b08281f905aae6e0b0315e9. 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/ES71G2031439.