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 0xc39f84cd49807931f75f8fbb8ee1ab3160b4850cfb9139d9c71b2d6118a3cd72. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84c34aa0-56ee-4238-a763-8950775fb87c.json and https://artists.proofprofile.net/proofs/artist/84c34aa0-56ee-4238-a763-8950775fb87c.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 0xc80d48fe695f3888727e803a01e47caaebfb48e5230d0114f84d68af053a6a82. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72257350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a65386c8bcecc4c71ea38dd9d9fb06d89448eb91469ba42f399bab3fee2f4b. 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/SE6SA2427933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7a6f35c9cb250568a7cf1091a0a7d2905140214715fda47618430cfba166e. 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/SE6SA2427934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27145177446608a4d44d9914ca8eed8f61f04aade0631cd26cb7787fe48abb41. 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/SE6SA2427935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91322b05c0aca805cfd51c72a278cd19a75555efbd2dbfeeba85051e1496b8c. 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/SE6SA2427936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f9800259ca0d47306173fd853af20eb32d3e842abc1c93b8dad0ac59986e0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2427937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847e9ffa9cb6f8fed544b827478a1a24ebf1b82ecc4e1630f3ca392a9cec0ac4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6SA2427938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fcbe177f608638a7a5157593377b9d166edf3f09e3ebf619193117a7d32b6a. 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/SE6SA2427939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2bbcc8015e72226a41a095f1c8b88d35cee2e5d19a50384d24f1cc61b6f92. 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/SE6SA2427940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52420c124a3371fba28c356de0f0831e4642ef984329b8b17ed01adcfcfa6c4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2427941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dc37ea16e06b17862345c666e584aa61387bf9e41fc5a6d24e7fa041cfd977. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2427942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb6fa871ffad8ab8784be1ad0538c7b89499e778e31c69d2af7731b8e44e4e. 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/SE6SA2427943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae8ea6cf914c89ff6466224212f1fccf514a48bd864a460a26509272996a258. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6SA2427944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01adc8d171b16ca8241f956a2a392293e030df15ac2a784f60adf51ab7ac098e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2564021.