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 0xe76ad688de7fd0a53c27a0b20d5a27915b718636991c6c09daa4e06c26fc8d34. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a2720b3-784d-4d7c-99ee-16b063aad55f.json and https://artists.proofprofile.net/proofs/artist/3a2720b3-784d-4d7c-99ee-16b063aad55f.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 0x69c791bf85e7f2dd18c4c2276520101f387392ca65d7bbb746a6a79f2ff11eaa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7X2404135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2333506ff143c897e9855695dccee35e65b4851fc3102c2ce801e6a520f6a7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT3EY2426029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b2a5e8f96dbf56effb5f0021bf52d2cc145dccf74d86b8d6c7f76a337af77e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3F22421860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861d4362ae2915b968602bac82b65d6c160ce59b052d9bd25e73a7f991cef04d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:08Z), 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/QT3EZ2484500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1627c3542acbfd9808317fa7914a7a2aa4082c15e64568ed297c4978f2098a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT3EZ2471675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd0dc73f32543153cf4547bbf211670f12e445b5f594861e73a6bebd0f9179. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QT3EZ2469851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2bd1a48e38cbffb4dc5385adc73238a205a6b5dc44d2b52980b9322d596d5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:48Z), 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/QT3EZ2469856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7518f688d2e86e3f24e270793e918da0b2c3caa45b43fda1703a41435612db5a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:36Z), 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/QT3EZ2455755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db59d466006e463731dd885aef0001b950b4cfcda4aa079c625bddefb5b950. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:22Z), 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/QT3EZ2471677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc8122bf50a4435912bf8e85f9e9eec855c7bbee2678f86541773ca95b8cbb4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT3EZ2469850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114b73b6c0a99cbc28668b16b57d9c9e554365a28547c8ecc588323e7fc65dd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:41Z), 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/QT3EZ2469853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7099e89bfee21d501745f007e7dd1764256e697a56f76a8004fc4758188bc0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZZ7U2412036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e15af4432131d04643b646d66a579b5c7851bb61f0ba5f6528f173293a05c5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QT3EZ2486155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40da2a1dee42b2531616d51964fa7656efa5a8dd072b768821714efd3993867f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QT3EZ2471676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bae4039d989429802501ca9d81abf1cc65deb8b6abc6ce7747bd4fac1390fc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYY2589410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f1aef3b55face81e8622b20d0c800a8261f5db8dfe4f9de2f991f92bdff301. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFYZ2521891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef9a67a188ec9ef19060c12561621ee9744d9952def145c807947fb9ed4e4b8. 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/QZFZ32502293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cee9435c8125846320b70fade8e0c3c58d19a71bbaa9afe1800f538ffc258c4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:20Z), 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/QZFYZ2561781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e86498a32841e5293a182288fb8e37d0dd7e5af6c9a57edbfea641acb808a16. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ22511295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907f7c7f2c2a6a5261b08ad61035763afe92271e4af795324c7d8dc00d76c643. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:46Z), 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/QZFZ72558586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e4274ed4785b27ce51496a509f27c692ea5a1f60bad6a3f3469506946acc4c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZDA42573761.