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 0x8819861e84a6c1c168497cf683fe82b2d89729166f88d48b6d918d5a183cfdea. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/717dec9d-0b6f-4b6c-b57f-222fe9c40fb6.json and https://artists.proofprofile.net/proofs/artist/717dec9d-0b6f-4b6c-b57f-222fe9c40fb6.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 0x670e5100fb13e1b24c3b12bd37639cf7c290f083814a83b437edda3647fe8afe. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEAR42546516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7e9b99bafc6ea2cf1f5c62a703d3fdd453e7706113adbe2e23115f6792febf. 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/DEAR42544333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa152c471fc14c3f28327edc9eacaaf61626e5a2bc77239c2c9cedf4c0dd6e6a5. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEAR42544495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f06c7f8aeac32ee53cfe03b7e37f762791c13ea3fa3835820c05e9c412151b. 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/DEAR42544338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad60d2c006bb51b655559f455e2455d0cc9590efc18ea41f06d115a400846d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEAR42544312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a3109d439ad4c72cc69aaaf17449c7b6eaa24ad41d117ca326dc607313dc7. 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/DEAR42544293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680cd9172c71a3dcb52c64a5822fcca9b0fb578663b0cbe7755e47de1a8fd32b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEAR42544466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccc3fa82620c4d8255612be24017e5756e3b4a1c88e58a121dcb3bdb3e7168b. 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/DEAR42545030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624c977841352f6849b425c0174831d3e8d4a3e0550da0ef3fe18296d540571. 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/DEAR42544343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3170c4d73bb0e5df23b2a16080e559ddd876c66aaa4033f8c54e56a9b35a1b0b. 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/DEAR42544383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7275923148ba892ca6567679cd29b9e877b465eb56730d851b2844bb0932c0ca. 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/DEAR42544473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1139de3316adfa246d4fc2d497e5f8b714a2a197488f6539ecc06ead84a386. 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/DEAR42544314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ef0aeaa36bd106da82fc8d571d40f8f0947ccf840f77c984ad828289fe07a6. 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/DEAR42544387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790b3c7d3488c6e5587461d926e7134039588533c135782ad57e3aaac4fb4b50. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEAR42533621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648c21d1e9cbb840b770a9eab0ea13445d76750e714e2dacee60ecb42b75359. 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/DEAR42534390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfb0f43e60bfb8ce3bb2eeae8a3bd43383a85b8a8f9022831de69787b10af1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEAR42533659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08149c3578703a66a7c9ee6b0cbd6772e43f7981fae0f6941687517a24c75e01. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:46Z), 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/DEAR42533684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7a8100440cd59d37c06231daef21278947edaf59930ac116fbec66f1bf0248. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:57:43Z), 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/DEAR42534121.