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 0xf4b78ec3e29fae739ebcb8494d4a02c4bfde1cf53c83062a3b0f07e50468b602. 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/0e8e9b0c-272e-429e-9bd1-8e4e50a7e972.json and https://artists.proofprofile.net/proofs/artist/0e8e9b0c-272e-429e-9bd1-8e4e50a7e972.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 0xcc7f2ad430f2b9c710747120084994fd62d1c9a472d3d380c150660379feef8f. 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/NLG3W2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0bc60eafcb651602600e44b36db37bcd970f08b3e3741eef34e86ff7a964fd. 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/NL4AW2429202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e8a212a1b67f6739753e3acf3013d443ddd2eb3b472269726aeb300c28a9a8. 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/NL4AW2428102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481abf4823a6172a19747d23b04fbc06c3533c52dd73687d8231c5b10f20a89f. 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/NL4AW2327802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99251a9948551470d669641f599cacc10e71c4c333511b82cc10f3763b23302f. 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/NL4AW2327202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c649461708a7090287f88a9f729ef46469a88055e0d28b86466706c6180d0. 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/NL4AW2326902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8e53256fee021fbb1163a3a62d150d2eefcc3e54ad904faa4c3f4ff57a079e. 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/NL4AW2326602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe28d52dd87927329bfe17a893a80f1da1a58f6c5400c612cff4811cfe07505. 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/NL4AW2326306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e59b40b58f04a119fa828b31cefd469a0cbedcdc1b1da0f68b36e2485eaaef. 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/NL4AW2325802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8065673c34970b2640242250e36cfd222647ff64dbd29253da5c13269095ff9. 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/NL4AW2325502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4497b909a1698db33c2f46ec053c5cb68d2645f2e891f6daab97d9552f9155ea. 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/NL4AW2325202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c796ec95bec51629d0849a8325bb3320532668ab0880c08fab6d5022fd1599. 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/NL4AW2224702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d2c543618a4dd3b0615f5091528968a452a9513ccbb2904e4f8c0ded35e83c. 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/NL4AW2224002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556abb0eb4b0156d7ab810a44429a37248f9ed28b63dc9ac1b99b0fd41c632c9. 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/NL4AW2223902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed530a52f29ad4d8fcd4a15facab8719fcbe3b83b9e166281920a3d228ba8109. 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/NLG3W2200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ccbc114ebd1955bf9cd8f5fd96ee216d404582ede82026eaf0d1d2b81f4650. 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/NL3TA2109202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6499c81106c88cc0b87ff263f2e5abe3da3be8493aef722556a218d9593c7794. 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/NL3TA2108102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c064cf9d4ec76ea0f60ca1709791e127d362df4c3a793f57281aa989ea5be0. 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/NL3TA2107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d327301e713f5c076e8d3f6421db31d6f9a0b7683504e6aed75e9f833eb16f. 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/NL3TA2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ad7ccc411a55ba891bdb1dc2327155858b17511e7d137c09c905adf88594d. 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/NLG3W2400075.