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 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 0xcc3144ef4b7201ac3d38a24ff06958a55b1fb3520d90e1ec145daec224dc5440. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eb97b4f-43c2-4ca4-afd9-7fd3c9029dfa.json and https://artists.proofprofile.net/proofs/artist/7eb97b4f-43c2-4ca4-afd9-7fd3c9029dfa.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 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 0x082b9286db754324847faa3a3ebd58f144b50854938725c0b1d7b43fc06329a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2442119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346d28cba81bbd17a74227f3acad768b9d6fb9cf616036916770684168446374. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CA5KR2442123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5e3a8e9b12a902c5a2a37de73b1d1bf20f0b5110973c31a790a4f6115f3ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2442128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161b6811173b83d8551df26d8bdb67aa6c39905a0a069cba8bf17987cd10b5c4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CA5KR2422720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdaa4ad774ecd53f0b2c4c22b824632ef2a76925b303a6dc815b2c237a65e80. 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/CA5KR2485666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cb5fea1db3e9f4c5880aaddcc04cdd36e47e66d27bc52d477916167bad7ceb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTGW2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3244101f449db4c6ada0b33377d8b462c2afe1824ca039c3c6e79df0f12ff4a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTGW2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b940a8f3823e835a8493db9c2652665059c9bfd9bd82bc1a39e453b693fab20. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTGW2400748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ff0f8f0b5fda16860f9a93a1939964a3aa60291282c9efa552fe1c9d84619. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTGW2401424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc262e6a962c482898f17596c963bed024f9a59b9c93e04bb35cc4fe125684c3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:54:51Z), 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/QZTGW2401432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf451303a22f8614f0ccce96133988b9dbadcc49c728850842c1201b75b448cd1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTGW2402092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe244141f39a79c07842043a456a86b3a74d7397808e1e2ffab4f0342a7531182. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTGW2402094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0923f6ee86f5f5a6f0325a2861ec5319616cab70d471b20de72c6e21acef04. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTGW2402097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ebf8f6d2d214cc41bb4080b12f6be300136facefde1c22bd1861eaf04d7482. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZTGW2402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f6da9f98508c9c250babec466a4535ae9895f4aece69b3889a7f1e6244773. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTGW2402731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d69a84631e94ca6875f16d47fc712c6fc02964e5fd0d649f035b3bbd292b692. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTGW2402732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913997303177cd2eba37fd406a50192915fe0b1060f9f6f5e8925d38ef877137. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:32Z), 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/QZTGW2402733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e24bd8b1cabc2ee23a2c1dcba6c03bbaea1114d775f3d5db60c98e3b07f13. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTGW2402734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bf0f03cb9b399999876545d8985c3d84648d3520351a9fd8bc9083f899c120. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTGW2402735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a15bb62ae92c9450427503629cd72c65d85b7ba5c75d547177bcd21f55b625. 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/QZTGW2402736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb2ac07b6e54ae993cfabe4cfc5f4f3986cac453fa291be6aa3b077d524ca3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:03:11Z), 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/QZTGW2402739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf3dd7ae25dd743faa220a62798435957394170045f4f4696a30ef418e32331. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:55Z), 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/QZTGW2402740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588ec8a9873e19b0050f1a007dd1ad3ecbac102427e5f907f202d7b41d99f3bd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTGW2403559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c50f41aa05ffe812754f50258094fd527721813d5aceb1345c09cc0bdf75fc. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:09Z), 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/QZTGW2403560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d2be24cac7a12a39be7c843946a674ff71ef5866a2ab0a944741bb73030f97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTGW2403561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d7f0d0c417ae1aeb8b6869c9383e45b1fbd8b343fbc6a67c2d09134418ffad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTGW2403562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d0e1c6ab373f4cfc3a90a3ccacfe6bed4168d8cccba9528ee964ecbeefda34. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTGW2403563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f9f66b1aba41ccb68e1b4914b91550b9a50efec918fde3c2a1a7b8379fe951. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTGW2403564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fbd44597102ab1254d0b0a62b69a836271b7aab4fc375bfd27cc0d47161766. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZTGW2403565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3d376f8a7b927235cad4bae62ad5d80f8c3f5510985f4f11866a71a5dc085. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:24:27Z), 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/QZTGW2403567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50b76a5a3863ce6beb5ea751d735bde48dfdc7ec5a57d12b1558fc59361c54. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTGW2403568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9257d3a6b7ee537d4d704756548da48a8e3ee73f6b439de0e285eb2b9c980055. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTGW2403569.