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 0x078a289a8c1bfa29c4b3f49a506875a0f8f3d70f3e69ad26b2858444fb69b197. 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/029c01c1-c609-4014-87a3-fb794794eea2.json and https://artists.proofprofile.net/proofs/artist/029c01c1-c609-4014-87a3-fb794794eea2.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 0x07b1b255ddc98209211f2ad909f9aee5c744c60964d5163a49bd6673b4d7f351. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEAX12004011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8afdc3ea60fb0fa77fad47dfe4817663065e95e420a11e7bdf4eed8628d53. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEAX12004013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7034ac14b7e0d5517bfa614b8b6d5c69b0bbd577b1c8657acbb838854612d975. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEAX12004048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d49a017527287dd9b59b24c5f3229debc0552b5a67ee0e7815d69d1edbb5bf. 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/DEYT72004028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409ba8bab3a83ca20706452a76b4f0a58590f349b4c93c99c909c3b240bf0d5e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEYT72004057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c30313d779ac966dabde4d276f671ab10f078be7d11b8ba405d560a5e733b89. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEYT72000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e74baf8967e8197f9294e2bfd0c82151331a3146d8ae4508fc2864b58b581f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEYT72004078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61567fa47e78932771c145506a886b4ab2a82000ea71870da0d2563a42566e3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/DEYT72104091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709bcc5855b8ceeed2ba6a4b23493e2113e7a8902829489f329b23ad4fc61ae4. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEYT72004088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662dc476cc160e5f6d8e9070a7aa5671f233281bf154b7c4b799422dcd3a7c6d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEYT72104092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f76290d50e9ddb78e784d12b55a35b096759f33ba49a7da7864ca61b23b0d45. 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/DEYT72004083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e05d73ee9082e3cf4dca55f0c3b1c318262abc3f52f2dc2992d52ba3c0fe1d8. 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/DE1H22200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68211df1f5876f2c6ff4e0ec17eace6cad3c83c006981f7c59649dbf40f57c78. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DE1H22200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe147858e14bbdef84dacc7f30bf0072c131bd9984650fd3472975a5ef2e3cbb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEYT72104106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc123e1ecbdb99633231965a3b3e62ed8c8490b838643870bbe3f155e4bcf289. 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/DEYT72104107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7bb84ff34233a39a01c3bbd2b118268b93a087c6113191630e1c8141ba181c. 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/DEYT72104108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2de1c867fec3fabe8a8695236bd3cf964138ddd1af8bb93a5637dd9fd4f6af. 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/DEYT72104109.