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 0xa50770cf5a20d4601c33c8f92e9ff6b6962db076943b72f560f3abc9853f7f6d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d270b80f-a836-4c0f-a8fc-6ce3a9ea0893.json and https://artists.proofprofile.net/proofs/artist/d270b80f-a836-4c0f-a8fc-6ce3a9ea0893.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 0x94bc6a1b4560b2902613369c4a5a7f270a69be15cf42b472761bdcb5cc02235c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:06:06Z), 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/QZZ8B2439822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a1ec7e856a5531a5e7455629c221db760b9201e6a62e5793fa241cafbd4a91. 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/QZZEB2468525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c7d6599868f5b81050a8aaea16eb497e4d0c1c7148857c9e1be56861af0b8. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZZEB2482525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2a1d03dc338f9c171b1a63a04f2cecfe0bf96881bd31b65fa5123c328a365a. 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/QZZEB2499417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9025682167658dff1f48acb06a31e124ac61dcd3c8423dbf97e7488ebcadd931. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2571583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00ee3dedfc0ed50afe7deee2efe3df5b184d24ba8d91b8f9f5cb80fafb07870. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:49:51Z), 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/USLZJ2508360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2050030609edde71b2e1a65d60f668efdff2499f5a60b8e82448f0b244c937bf. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZWV32535030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20786f3992cb8a310a3bbe4c9bd5a4256147ee9b3ac18f07c1b73d16c6fdbe7b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFV2593895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c72fd69aa4e805c009d293da1b87623b72289a7b01fa0b0565fb5ad5e7ecba7. 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/QZNJW2482201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e174fb6ffae6df9bbe5d0efdcf12366b452725de27537ccb899c43b374e4c. 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/ES64E2488351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa47aa0ed4caae2b26fe9997599f051b29ce495229cd9af6b693fd28543c01b. 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/QZW9L2490428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d43ec23aafd5e2bda4caf4155cbd2d344131e026fbb7c445a695f1fd8971b. 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/QZW9K2429629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868920a90c1a0fdaad5cbf090a81e7b51f844d8a631bd69eb1f1a4bc48ffe1d9. 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/CH7819573521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a1611c6d7dc1d9483d28fb5e47926f158d09d1a508d766d2e61f81ac8ac96e. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZNJV2440690.
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 0x43ed0f66792af84a6bc21c4efe9e92f8a93785b929ce74249a419e23c29d4e8b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTVM2446635.