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 0x66ab4fc4ef0fcf54dd659a87a990a82227c7f48bb3a5addbdf46b88c7e59a338. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49c9281b-28a9-4dc8-b4c7-f42a73c29345.json and https://artists.proofprofile.net/proofs/artist/49c9281b-28a9-4dc8-b4c7-f42a73c29345.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 0x4061d16366d536e56e82919177316e1627ab601e66f402aa029e5901669ce379. 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/USQX91900219.
Rent (Original Soundtrack of the Fox Live Television Event)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf9578113045fc64df3ccb9e56677ad7c0ac94b8e624d086a35f826b5ab436f. 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/USQX91900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d4426fa730001bd6ece672ed0f6164db5b6bf94e4d4b7c32c0442dfa22060. 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/USQX91900192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570308c90d168d4022a1f767964f357b89a77e8d7e6fcf61adbf50fa19db069a. 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/USQX91900195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c42e64e8fb01dccd4373cc29a0bf17533501bccaa9ad12a80d4caace8b416a. 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/USQX91900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30e017f6f956774d478e86bc68e9927f1a41ef7dc127c23a8045f209f26cfef. 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/USQX91900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd907415219ccf8ed200a44997e6a1d0753a4f8d4d738cbe5bf497f2a4c7c2cbb. 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/USQX91900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dabca7ec4685ea8d0be4b063ffb7085cd5492c795893370e188e73b7315e30b. 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/USQX91900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8242e6d2d6361c9cde3a1cdcdb6191f539dd8c02b1e462e4a7a1ab73dae2791c. 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/USQX91900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4061d16366d536e56e82919177316e1627ab601e66f402aa029e5901669ce379. 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/USQX91900219.