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 0x629bef270b74da3bd279375daf411fc646150ed2ea2bedd7828d66ac65f04847. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/376c1d4f-df64-4ea2-8704-8fe058164198.json and https://artists.proofprofile.net/proofs/artist/376c1d4f-df64-4ea2-8704-8fe058164198.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 0xb99db5579faaee31a3c225e56134d4e2f4b6b413dcb123987b765afc2a52f0cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMA22607963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393282a70c7f25d8897570afb84f96db431ca1ccea94a3cc51fef5a57ffa1868. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMA22607964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ca2d947ad7e46b301fd621aa091f38e5beda34c62dd7bdbe9d8bc8b504701. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/GBMA22607966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34132801b3d7f9aba25341afed541a6cc83df275838d30cb5aefe7de7955956. 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/GBMA22607968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c3c971d87a81ea2a7d3531001586db930c08dc061abadb7ca1f058136cb2c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBMA22607970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c4923e6692ba1f78e6ae20243b06c768b6bdc47167963f4a53389f172c8070. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBMA22607971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3d38831b363f483c4185c614d6d0994aedb9986c186cb9c395b4167695f5a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBMA22607972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993b95e2e2d11c35f6498a10ca934be6cead895cc2cf3b17d369495f2d76f2c. 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/GBMA22607973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbed5216f304f5d44bce361a232bdde3d7973729a8c8805db6ad16d4f5800d4a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBMA22607974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f0958dfb9f74bee394e8d6e2ad33facdeb3a38e3d6217bb81d29ccdadd091. 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/GBMA22607975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b59639ad2f5a4598b8404260110f2352663ebd343cc3b61f5c17013df28c9b. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBMA22607976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fd2760b30e0f91eaecd1a57bbb4f4e2103a5e58d7baeb228cc1b2fc16473b3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMA22607977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239d9e7fec0ffb7deea2d3be881e80a797f835cbac8130993a9a9ef748a5c548. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMA22607978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b726ec62d109a31d7a021e9cf9a0fec91b0ce354be011274f7a09505d49fbb0. 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/GBMA22607979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc8ee3d033d8bec8f8f932324cc918e5ffa4e45b485a0f3364fc90366772b7f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBMA22607980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4925643c318e36522e7ac39a8b68a798717d73106ea806d87135c41d76e722. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22607981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af60c34c4dc2f09876e8d5226aa99b683fb8af6d6ed4fddb455193a77f47740. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22607982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5fd9856ed9ede4b55c5f3a86bf5ac5055ec659871364a8b64e49e172b8cc58. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBMA22607983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffee7f551a59e848107074b6a679b978008b909041b6301727bb7f2d25a763fb. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBMA22607984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2107c516722e50ea286141ced0752e110a940464ea3e5be9b73cd5b50ab1a1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBMA22607985.