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 0x1284d0c3dd8f00c9d3d248e94587976eca95bf0b2af7a84ad7095dd17ed48c2e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a56b5d4-59af-4db1-9a5d-0779df320d19.json and https://artists.proofprofile.net/proofs/artist/9a56b5d4-59af-4db1-9a5d-0779df320d19.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 0xa0d6b0a97d96825816c035681156b57552e8145eace58da77a5a398d9c60ee60. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6Q2125175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c49b01d65aa8e89afffab0d8fa7d020ec509c7df2cc907d75591e9ed2189af8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6Q2125177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6085e6aed5945ca712daff1cb98577040404019692c133e34b148cd5139cc. 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/QZHN82186639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2f064e4fc441bffbde3edc4a64bc69466cc02d63dc02ab6bb2de1f1eba866. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN82186631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14051e8977eb1bb4b87c32cc0b72d2038a9b7b58f4c3bf07e215c6a954c2d289. 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/QZHN82186633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f5009c100cd21fb3725725d750155af6b441d3fb0201cafe5c8690099587fc. 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/QZHN82184970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75920bafa94d32f3b1e01b260f13328c36a313556b8024fd2b3dc1ce39c3ff3b. 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/QZHN82184971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea06cb20c0fe1953012d9909417a91103c73fadbb2005b37bebb30ed5182511d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA62147957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b018c9d1ba93af24d1810a72c7a0e703682daf697e5b8add6c2d606cde5fe6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62164682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472e039071c0fad98d991170635d163a236509501cd862ba5296a7be93bdaf7. 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/QZDA62147952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32140d4f8d010600c64611049454e65d0f922a6cb2eef7454436e4cc91fe0cd1. 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/QZDA62148030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92895b4e92382782a4f64610063fcb9c153ac06d8262849df9060c70dc7a965f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA62148041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692d8299e059e1dd3d2c49460f9589fa4293ccb039f37e75b8686cd62d611a9. 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/QZDA62147964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd883bdd5fb7abcc8ac0bc6b80e2b7b615468572ca3413c5a2098c0f6cd343a4f. 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/QZDA62147965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcf6d88ec2ccdca143d37410eb5155e9f448488156fb58b8a377102dcfad658. 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/QZDA62147966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d452cf35638acf367cb77b01a489c504ad27b5d4a0caee5c0f404f0b08f92a. 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/QZDA62147967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292514f0f8e88fa58b0e5bd179b9f11935ee90682461cadcc4e6817598de53ca. 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/QZDA62147968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c6d402e34d913ef14119cf3e3ee4e9480de6ff278f98c3cf1586d18b60a6c5. 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/QZDA62163969.