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 0x1622fc73a79f5d284c73cc99878bd939a9ce5f66840f58eb5d94f13d780b298f. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aea11cb-2e67-45e0-8e6c-3bc948bcee2c.json and https://artists.proofprofile.net/proofs/artist/7aea11cb-2e67-45e0-8e6c-3bc948bcee2c.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 0x4c80f80211d395c52d93673dd36fb37200ccf443a0a6c18a08efc42b03d65fac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR0331401199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70addcec3a0c3b1771676f6baab5a01a5040f74854c42fc444379f1ddd10e29f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0201004177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e30c91d37edc2dac0a0907efbdd302512ab949662e65531cc37a89ed6b41d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRAKF1613813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd274554d0726ce64880f75b5dfae1758a15c5cefb047dcdc4641933dc812c0e9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TRAKF1613927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2dc7443cab438da6204050392aab302920cb31d60e4ed3b84743294dc50d9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TRAKF1613924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dacf5c319c83f7df4a9647f651217a2bd911417f8cc92bfcfdb8cfd9b88594. 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/TRAKF1510099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447d3500903a318c74690cc8e441cd4d4480d3abad76600ad817d163b9860f2c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR0281104405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc8ab1996ee7d18062176ede9d99b5b979b230898d2e0ee9b570310d21e7392. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0281104403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb63ddcd1734eb0e25dfa311fa84ba25bdb88c0f00e03d1a1eba04f6935258ab. 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/TR0281104402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4738d9c7401385e6bd9e58b1ab44efabdc971a5eaf592bca5c8f18d0a01707. 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/TR0281104408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a583bb5c70778aada0639f7b94728ffd1c9bc9952445b4cc3ec96c5943823f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TR0281104401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5aadb5dc5912651827e3fbddcc8d58a2068a4c543624eb442453cb9f242aa09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR0280803664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e313c5fb15b931e962d0cc5d4bba79766be1e4c96529b5d04879b441a4f4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TR4352300863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e30c91d37edc2dac0a0907efbdd302512ab949662e65531cc37a89ed6b41d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TRAKF1613813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d25a338883aafa574e2c373da72c5f70fb9d99238a78563fad3a3acd74b7328. 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/TRAKF1610791.