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 0x9e03d1a5c6548e910f9c872d1be8381563810c4fb6695a7bafd26b61ac30c5f6. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c832c0f8-dd9c-4a28-986e-41c2555d048b.json and https://artists.proofprofile.net/proofs/artist/c832c0f8-dd9c-4a28-986e-41c2555d048b.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 0x6766e6e8dd1574a769d298b0e6ae8533f78f262acaa87061e122879abd9b7569. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GB9TP2000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebe10fc1f8de856208dbf8644b63bbae08e3253ad1eb8e4dfc2fc466c55c209. 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/UK9AV2200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31c14d4d924bf4cebacceee0eb09a81bb5fe9670a3d2c2a24e3f5bc44802218. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:15Z), 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/GBDCA2203965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4875121a59b774db74e3ccf317b5ba6532bcce69f01c66f9dce877a06543d049. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBDCA2203973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3a4b5ed4c3f6a48e0c75ef127f6ddefbc667de2420b5109cfa06d594f4eb4a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:40:12Z), 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/UK9AV2501226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda534423341ef3915c1adc9184310a3bafe93e586ab625ed40ae362e2bb0df8d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:49Z), 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/UK9AV2501224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd958d70e656a417f3f794abcd8b6211592633174ae6b068aa03fd3873a2b22c7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:47:36Z), 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/UK9AV2501225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3a4b5ed4c3f6a48e0c75ef127f6ddefbc667de2420b5109cfa06d594f4eb4a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UK9AV2501226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5036b883133373b45797820e2fceda0dd7673b6fc2532443c7f331094ad381c. 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/UK9AV2501228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b34e7b1bbc91b69f7d9d9ad412d45115ac4c595d7b0e4cd4eea373ffa2e64a2. 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/UK9AV2501229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca808b1fad213886e6f0c9d50ddeeef4d088b7bd7706699d080cc23f77823325. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UK9AV2501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578f92222581d9696946c00703b691f36b94195bcf2fea1417a2c3840a8ff6c. 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/UK9AV2501232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a943453be2073ab9ce7f69c9757c173d72cdd394a4b90337f1c8f6a4826dd9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/UK9AV2501233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d26086f6c6c9a7cfd95913fe00957ac4267c804806531aa1b7eeb6a53d1a55a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:30:13Z), 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/UK9AV2501234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247a73aa28fd0db64f66dac767b28d824205512bbdb50437dd725bb52f6e6c9f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UK9AV2501235.