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 0xb21f5ab13225adaa4370d7aebe28153b5bca07c7891ae83d009f1a279ecf5af0. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac93c721-55fe-4e20-932a-1d630e6137be.json and https://artists.proofprofile.net/proofs/artist/ac93c721-55fe-4e20-932a-1d630e6137be.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 0xf79a1c9cb25db39628f79e0b204312b879f55b1478be5b867581ddf55cb312b4. 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/SE62M2306947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832d3588b45c6980ce444cad1a7d024a090a0e6fe23a9587b108f23249358f76. 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/SE6A92335951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe893af6fdd4d9a8867968e014532fdd92c4e9ef0d583b4af9f018c06fc1b34. 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/SE6A92381873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516fd13b997f19726ffd11a35edd0ebd557b0ef5a2e8e47c937ec68ca6c366b2. 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/SE6A92318252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9008781b0b7162ebdc5f7e08d0017f86d46e2a284cba48e641447ed840e0547d. 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/SE6XX2366131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69017411a81e1d7babe318fce388b29aad7eff0141d342ce35400e5c9554354b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAHF2329615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a9794a2a68e85c49601efd76b3a772b7e8bd59c9ad3059051ae4a75d485702. 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/TCAHF2329645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f342c812c78219359f67e7c026083871d5f2e6ee67203800d93274287b885b. 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/TCAHF2329662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca2ac6f2133131b18ec8edbfbc706a2bdecad79b4f26c6d5503c9d4e78bec2. 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/TCAHF2329703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e2e810d7cd52da7e6d399afe42c6087f4c4890c3582b980af1b1556dcf244f. 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/TCAHF2329733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee402273460350beabe53362cbd92e0f1c1a796d9ea3c79266e8be7a9cdacdb. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCAGW2325854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db850145b88b98275a58c22bf5f32607d50ea013b4898b4d981370c49c88e7f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCAHF2329613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa6137538b3aeb7d252ab60250e8df093657ff1288297e18e064f1f79dc6f48. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAHF2329650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d961782001fc0d65cc960dadd76cf17a5f38aa73702ef4668d7c84e369e6372. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/TCAHF2329682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5377017bed630dc62764a196f5e90918d34ed924de42e67605613bfe3e8415d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAHF2329697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc8348a3b7f915e385335c2ac9249c483845db4b8417efde7bcad3f7ee39e3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAHF2329723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b936fa8fb372348798cea073ed4bec855750a49ec552bdffe9b4290559703dc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAHF2329790.