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 0xc33d3e7ae1c76b5a805808ac6a475e2abfc5808d7afc992407ce55b82313ebeb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73b039d8-6c1c-423c-bb56-178d31860365.json and https://artists.proofprofile.net/proofs/artist/73b039d8-6c1c-423c-bb56-178d31860365.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 0xcf2b8eddbe12e096640aab4838fe65bbbe1ccada670b83fadbab9521c5824591. 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/BKO442300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4e8c42202994ca6f6f4568f9f63fca23aefb5d1adb80ea31c5049a69fbe721. 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/BKO442300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6516992756b9765a8547111c6316f81a498d8e110a147343613960435740fb0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/BKO442400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60b9467f5fdd0b09ed3ca2d60790d433f95ea061f1be8704958fe5b3e7d51b7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKO442300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79a05172eac8f73a5874cc3abf62821cf903a2f56bcd4d1b1dc986dc76ba81. 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/BKO442400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e627755b0f36d285d45b61e90fd989792faa9756af9b0e9adcb5bd643b15d7. 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/BKO442400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bc078c32116c763bc72b02af84385d3bf42c22443a6d7b95dbfdbe7f0030ad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKO442400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b89304cbcf831371e2e08580510e39240ce6ed193ff2517afbf8ded40e674e. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BKO442400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91617786eb74558686611ff7e0844e60dbb72fec9fe7fe89c9b418f2290358a. 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/BKO442400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0639ba00bc7844b449ce0b45f9d65d5dac8fdda93d138dfb156256a0c173bc43. 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/BKO442400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91617786eb74558686611ff7e0844e60dbb72fec9fe7fe89c9b418f2290358a. 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/BKO442400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5afe78670b57f56527c79bc16cfd75f1c439f26cfe37c2d7f9f3dcc5fa988a. 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/BKO442400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c80f6556d24e2af45e957921c94f5ac61540957accf5db35d18b1f58704886. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:14Z), 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/BKO442400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6fdfa4dc1a17ad7966f2cc584258bc99ebc39a7cc3c2768e6e1570b87d61d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:09:44Z), 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/BKO442500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f84e72bee825899aa3ae0eb18df9de799fb835dd3618f58bc58ce1b16a6803. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:07:15Z), 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/BKO442500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ddb3d753a7515fdf184769761b2943c76f5c92fd942f39191f3742ca533386. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:29:05Z), 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/BKO442500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab26a969aee3b897b9e251e8c666c0c5b5d1eb332beea3935582089bb118d76. 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/BKO442500002.