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 0x88590da1b2640fe5dd5e182ebccd1fee3b5b721333cc2a211e5cd5978951ffa7. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a97cf83-036e-4ba4-9db3-5fd911abc660.json and https://artists.proofprofile.net/proofs/artist/2a97cf83-036e-4ba4-9db3-5fd911abc660.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 0xc6c70279d9ef3d69c824b47a9610b4c51f42344c58295c731f26102202cbee74. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHN2224036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b0a52ed9ed719fdf592d360c6b07262a8099fca53c452f3e934ba3a8b4f5fc. 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/QZMHL2271200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa940bb90cacafd11ac7b561ad2082ca6209ab6ecd6c6b735d15ffacdf39cfd51. 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/QZMHK2280289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a56e3bd213af36e7e871574b3ab94cf335247f83defeb7496b6231e572720. 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/QZMHK2224535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e1a38d57274c993fd094a28ca6ca6cfab0aca3b80c889a3e12a59cce6a2ca. 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/QZMHN2205311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20499b57ca626e37fae0e01d175c5801ec1676b0f4f823f1a73ec4e1edb31de. 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/QZMHK2274227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737386a3f7f4f571cc16f05a9664e94b1f747930cf245c94ac38e6d290cfe38. 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/QZMHM2268156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a182e52e8b519727553f0aed641e320a6961c6dc4f178a5c075d4a5a9504e0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZMHN2241100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead5760222461092548185e2f38d747706fa9489134a351610e21d5bb9fe44d. 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/QZS672239534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062c9050e1604344eb7533348516c00d2770930c396e1786ebaca6fb2fce058. 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/QZS632221924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0ef2140114ea14d2214ba6a388a2023ff43d364bb69962ada05eea7880781c. 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/QZMHM2210796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438fcad40e302efcbddc18e6471c247aeccbc969985bf8f091d928e70dc5faca. 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/QZS642277081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefd60743aa63cd7570fd114f9072cd1fb1b21bafb1dfce035dbee07dc336e58. 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/QZS632299782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745c8504fcbc456f910d4b2d74843d05ffeed4fef9b11c9892c85259dcf13777. 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/QZS672255384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0494b8251a2d72f5aba33404302843c2b2353162d8eaaa1ba86cd19f855a86f. 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/QZS642249267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e288ad13a69bbb0f5c53e5726fb1f6dd7bfe15af806f7d78e2ed54daca925c. 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/QZS642208400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e12fc06fc5d9b9e7ef4ff37b72833571164073d8f021b76625026902f15c55. 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/QZS652280953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ba1039c781ace5b31cd94ceb173f78731427c6584ebfb0b33e34aca0718f0. 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/QZMHM2271895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090b6c615fc67a7e05d8447b899369b4ff5ed4dd01f0d84a6d829cc0b4272154. 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/GX8KD2266161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b633e03608065c1094febf912fb533f16d78f028d584bf29e26e335053f42. 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/GX8KD2277459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc89ae44fbe1e70e0e23c18a540a151c4f6abc3fb1d6331a5935c6a620207d6. 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/GX8KD2276143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd8b6f77f5bc7e7a3a79334fff6ca89ef34c5e7e03e644f7885183a14eb180. 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/QZMHM2338507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1566bc431e90458f0f0365d7ebd33043543763b4a6a7aa42b72f90b874ab1d8f. 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/NLCK42226504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04837cf6534136a408ef8d6adebb585a7d65c8bca52f2412b9dd5d8e11eccead. 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/QZS662135634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4593003bb9157a751cd88af9a489628f75839e28bee8e044afbe9682d93021a3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZS632122793.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa10f4ad5cf1b76478e7aa0d6b2865ab2f07ed86da76d33b2e09778397e1cdc7. 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/UKL9R2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bebe23adfc57b9da7185a443ea0e7b38cecc11d24bd35dc27d33f28dff2ede. 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/UKL9R2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb359522efafe9d8a385d93665b278d0afb13a8861458c77da2ee7c7daadab. 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/UKL9R2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110be1e72a7fc6fe5d4e95aab2c3227d85cb99de41ec210cbd42dc064771d425. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKL9R2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1212888561f830ee729cddbba843686e1adb208b9ddd96be14771afb2db23186. 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/UKL9R2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd470c083b4c473a27714c060373cd6ea7125496edd01ea7e8b8ba03d057fb858. 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/QZKDK2372791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763b93604ccac3d8ba6be482f75f5e4f53f34881b8920a6792d448ef270f162c. 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/QZNWZ2216671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b5a43f7bc4f685b25b070aa789437024d588f30c704ae90516fdce38ccc7d1. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZNWZ2216673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af39ba8e5620161f665b9d8d349e21e901e5e5fc571c6bd5ba635f48ff6ce3. 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/QZH5E2107569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa468fbf2beb0b229b58128a352c6ceabdc11326da973c9caf69cb1120726e. 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/QZJRC2252949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4c698cc38c1913b9b29fa03ddf710bd24bc410c00b86f38506137b3dc2162. 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/NLCK42234085.