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 0x349670445fc0e0852b64c3574b20e4f6b0bf02fa732eef3773eaa50bb843daeb. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41668793-a550-46fb-a268-6ce3efe5c128.json and https://artists.proofprofile.net/proofs/artist/41668793-a550-46fb-a268-6ce3efe5c128.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 0xefd8d59bbec2099bb4d907966cefc2c9262ce9c4f98d8ed63f2faef9359cbf7b. 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/QZMEQ2277655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6720048f9e78eb6e2654fe7c757b828a9ef9563da42c8a1556c1ef602b6a56f. 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/US83Z2516308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66cdc4ffb337819e701c08480c110993fed6d0e159f401788670917b6a02b2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US83Z2520810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00765d403469a320926080401d537c43e2fd7a6a32f3447ae76759883995bbe. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/US83Z2529112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d14dee5cae62a67b732b904cfcbfdf25c07137ba56f110b6e7499c5899f84d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:58Z), 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/US83Z2531967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958d227b250e2ded06040f8387ab2ba68165633f1d0d2391afec5f0b877d507d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US83Z2532714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79667d895b51934fea3ef8576ac92254eccad8a72f5c0318f7c9308c17e6bb6a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:53Z), 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/US83Z2537321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbbdf463c0a304549f35474954e9d22da66ba7ae607ef18b7bf866b9368b75a. 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/DE1QW2500559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc725e7aeeb6db7257276e45a4905fa9e30d97fabd5fdd5c8dbded691876b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z2556337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6193b2dc48c42a54c64d0c9452e915c61c7467a77e90d15c83f55d8d9f8792. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/US83Z2557945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e653105f3239209c0742def31d5e9c462ab180021b284058575e34f98eef6a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DE1QW2501792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760b7951d26e36fff08152ce0f19ea24bc905a34f6ca4a3998337ee86daeab8d. 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/DE1QW2501796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1358506607b90ca1e57e4e2b7108003bd5ccd31fe4f9ab24c1aa68564ef32d9a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DE1QW2504386.