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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 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 0xc726110d6807d812385648c3707ff6b7cf85cb064014204a9ee92da9fba41a68. 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/234e6942-997e-4e1c-8c7d-d120a3186e95.json and https://artists.proofprofile.net/proofs/artist/234e6942-997e-4e1c-8c7d-d120a3186e95.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 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 0x4b01ea1c95ee2170b62c24c380e9144474efd6c023536bf95baaf1c68d1f8090. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEKC41100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b574cc5d9702085767e4a26151fc6d4db4ab0b64753e48fad50f010ba09d5a6. 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/DEKC41100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a92095925f2eb578a37340c6535c70152ffa7fb6c47eb77afb0d08aa2f2d43. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEKC41100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4751964bdd6b323497007c53cfc8eaaaba2b037e670ce373bc62964d5f1f05de. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEKC41100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a293fb6b94246cd8c8870bc2bc41e26cd8e61803b0b2031272ff5315d933f2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEKC41100386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0beb38f089204e9c90144bfbfaf14b90356ff40cf5795fa90b82c68ee1cef020. 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/DEKC41100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcfbf0ef4bb86bdf760519a6742c4691f29f83ebfd386e971709260859a8ac4. 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/DEKC41100389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38541ee9d6d883fc5692d215f4b8ce21ebe62a264b7773cbd6d33e1186bdf54. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEKC41100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc10899d78f5e2329aa0929223544c226e0894634570db018b6b0c0a47ab636c. 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/DEKC41200982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7440bce90052864ee0b47d98d60dec9847d4c370cfafb1706d8c951e01afa57. 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/DEKC41200996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ae57d9ce66b471f2c73085117c1bd6137a821e3e2af16ef83f1c1d94c12e3. 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/DEKC41400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440dd2812f9061e87ee16f1afd26e91e059a5ca79ec94c7adf00fcd7aa4bfc06. 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/DEKC41300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b92ac8614f567a39f8f208e7d093ee919076264997ce1cc992bfffe9676eb41. 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/DEKC41500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d6aa57f2e2d1a1e78eec92c11b4fc382a341fa1637762c6693fa83252af886. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEKC41500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b955c71c45e5e7ff4a739f80f1aab3c683434ede8fed6df7ab8dc0eb83dec9. 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/DEKC41500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df1e9d3847ef970f5294a4dfd2ca5b651ac293c73c12425de153a367471c55. 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/DEKC41600053.