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 0xfc9a929f2c401789b58402a82859f9bedc65956926c25316e87c80306bbe2d76. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a3fd9b2-9726-471f-adf2-929349ee90f1.json and https://artists.proofprofile.net/proofs/artist/5a3fd9b2-9726-471f-adf2-929349ee90f1.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 0x556a3dc1bf43fc1eff87074b68c4616aecfbc7eea2ed143ac0521a668a97de17. 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/PLE951500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0622b4b3c8c5e42e8ff62f39a51e0a051dc07131c32e2a0f2447dcb15f35e82f. 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/PLE951500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf24ffee023e4537dae11f9e3d5fc4911d36e2d7667f6d5d22b805c02c60da0b. 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/PLE951500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a472666c74e7d8cd0b8df2fc4c215c34d1d017abb18e9d4bc292a592ffc3c. 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/PLE951500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85d41cc3182ba748b736ce3ca3faa4905f32fbe345ac3870dd032c6406a1c0e. 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/PLE951500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01abcb4ec445a6dd782ebc9079fc355d2631e7aec833ad0fd9a5605734326bcd. 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/PLE951500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf6422cd0df830a9b5450dff3ea85ecfdd657a0a88408bfc3e6eb4db313cdcb. 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/PLE951500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1e01ed364287a2e51abd921a5d162922901a736999c23f2078be46700a26f6. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/PLE951500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db0bba3c0f07a71140e8ddf80cba6304a9b43f1faef52ee7ff4290f1c7b628. 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/PLE951500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f85e99c3e2046c1068d07b7111d899334898d99a23a97ec7223edae5cad8e2f. 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/PLE951500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64fca98c530ca49be832d7e6e0881baade7d1ff8dec95c67ba65a5a2428f52f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:17Z), 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/PLE951500070.
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 0x6d5731b688d93e41c4d3aad65d89934bff5dc442d10b86afdbc2668434442267. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:41Z), 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/PLE951500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bbeb7f73ba855bfd7192b0442320a6829554096eefa31b57faf06af4818cd6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:41Z), 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/PLE951500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fc9b95ec7a4bf74d6ad355149721043920b31425732710900628abaa7b16d3. 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/PLE951500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7756bb411333c4cc2d68721b906e693643d31659f8343780fed031a495273d85. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/PLE951500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e3a94e71b6962c7ff98313d405c6604f403c99527e4de8817696abd8dd9702. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/PLE951500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a739af95572be4bfd9d80946beb6f1d73bd161dfcc32f671033fabd53ae3f61. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/PLE951500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6278f565894e46abd236e41e4f8e37da92ce9d6c7cf83522f29149fcf7a00b4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/PLE951500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3643437313ce985f473b1177d8859bdaf42a8dca19d37081ee45c6cd77680742. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLE951500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53915b2acc66d9c77863f25f9f1314b4ca739e1f7d199ad1738efca503802fcd. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/PLE951500087.