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 0x0d9ea59331216c1bb254fdcbc8da52d177ea2e7d0bf8feab85c18494327e1812. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd3306e8-d8ed-492d-88c4-234859ec4d1a.json and https://artists.proofprofile.net/proofs/artist/cd3306e8-d8ed-492d-88c4-234859ec4d1a.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 0x10cebffc30d0de7a042e7ea1630f1a382c9545863fc075742e47d74d92d871a4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCACZ1784000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b2777cecae2036fd4620e7917cd2bf85c243dd480d012795315ce0721f510. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEC1978140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833a08089ed75a7080eecbd83bd59ff67987cfcb4ff15c5a6180f379416c0fdf. 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/TCAEC1978144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d416fa03fc3da4083fdd32d3bb7a34a0c522cd6b5c05806b00cb2b451c10dc. 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/TCAEC1978154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16980cc10efbe00caec2e81f8548d040ec2cb140aac99fba56b86db92744a5d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAEC1978191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc693d44ac8f11d2e687fddbc209d23e8ba74e4dfac98234a615d89ea91126a00. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:38:17Z), 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/TCAEC1978192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22b254601487656326ec4ba9de0d8b3cd0833112eb214f307667ec2e08d8264. 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/TCAEC1978193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335ddc9ef5f5c20b0d5b2f2b3afd24b687692969220c13a5d417c8b2ebaa1d6e. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/TCADP1803901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025622b66545c960ae80d4c04e8eb8699724a08b0720c353e1608f9ccf5c108a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFJ2113088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9404c78ef9dfce1e384c692ce5142f7a8d5194146f6e3c4317ceaadd131ff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFW2166076.