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 0xb70ba38853e9ad8ca8a49403b6fe724c4ccdf4981a0ce2cc6366af8124f866ef. 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/173de799-1206-4249-bdd5-8c48ed902b3f.json and https://artists.proofprofile.net/proofs/artist/173de799-1206-4249-bdd5-8c48ed902b3f.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 0xd05559cc310c5b2151f29e45eb41c5aa329dcb33413394bbd7e5dda9075e595e. 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/QM6MZ2403990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06510172128d7bed4ed1c62b8afcafa38e992f26903f5ce17da486409d65e0e. 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/QM4TW2438349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5b9d0715ef73f79381a9a24dd746d7c17f645e3dd33931b0248397db9cde48. 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/QMDA72432548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb77277e95d3202666f27990418263652104c31bd6ac78b248b1b408dfd9b8b. 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/QM6N22457091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7b619105f460591dac54762a6ce0143e14ae47e9d567a1b0208ca44c0a4a6. 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/QMDA72400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d45e1221b9fc89857e7e0f57902d9ed778900724a8f52c51bfcc8970e230cc. 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/QMBZ92488971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b75b0ac105daf1b8d05eca8de0afd22722319607f6eeec70a3f5a00aa0fe7. 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/QMDA72432550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8382ac51932c8e3392d2b08fb1972d5e8ebdbd30ab04170c79de6d3dd21ee8. 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/QMDA72432551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1582982c47e9e808efd3d7326715c33f77bd2e64333e1539cd79f1e3ae70243a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM7282435210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c8846178be9d5c1e34ca44e56031c8a2eb92470fae1e53062b99dde54e6c0. 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/QMDA72432552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd4713507d389c74b869a0bf3c997dde0171acd4f3ddba8bcd605f410b57a7. 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/QMDA72432553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186bbf14fbe1d2c02bda27fc9605b8762db35a27ace157fe72e2b9558ca60183. 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/QMDA72432554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186bbf14fbe1d2c02bda27fc9605b8762db35a27ace157fe72e2b9558ca60183. 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/QMDA72432554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803b75b0ac105daf1b8d05eca8de0afd22722319607f6eeec70a3f5a00aa0fe7. 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/QMDA72432550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7b619105f460591dac54762a6ce0143e14ae47e9d567a1b0208ca44c0a4a6. 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/QMDA72400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1582982c47e9e808efd3d7326715c33f77bd2e64333e1539cd79f1e3ae70243a. 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/QM7282435210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb77277e95d3202666f27990418263652104c31bd6ac78b248b1b408dfd9b8b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6N22457091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1628da269580d52b1bc13b04e5e0009d80e27cb4590e98c33bf47f0103be76e4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMDA72432555.
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