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 0x5073331e1aaf68c2242eae22af813524097455078e5d63b27b11dbb7f6af617e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8afb862d-e101-4fdd-b053-36e5ceba59df.json and https://artists.proofprofile.net/proofs/artist/8afb862d-e101-4fdd-b053-36e5ceba59df.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 0x0867697e817783fa0dda5f83728b123fe83eb123bbe50cb058770107adf26c02. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZA8FO1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbe66c4dc4be808cec9fb54245999a0b8b00b627799c960cd06c0ba44e64d57. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZA8FO1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d12f0ec69ec40ce1d88cc2283a38b760bdaa86c65a58d15db151c8e5bef472. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/ZA8FO1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ddcab46e0694ed31393f1682917281cadb6069b2f96066607b41cd8e8ce71d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZA8FO1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a229bf6b8758daae493109f85991f2d6a96c42f3c89e1b20d0144be852bf159. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ZA8FO1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96d97f0d5c65adccdb14c2e55161bbf5f3311d8335c480117b9e00c7bb2ed4d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ZA8FO1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc601ce90b4b87b4dcbd52337c86f48be8c0b96cd70bb3b9d066879e946b6a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:08:59Z), 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/ZA8FO1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9963bd4f930759298672d40cea3f12b1247ee20c3c39e4f9b1091ee53fb5d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZA8FO1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff68904859fd7fb924427698f6bbe27b00dfcbc85ed80439c1c5549732731219. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:57:35Z), 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/ZA8FO1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d303e4a4840358ba5025a51b761bfc91ccad6892137491df46b2d1f4adda2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ZA8FO1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff497ae2edb2df8a93942c52c19f1782b917d226b3e384c89c536cfb53dd909c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ZA8FO1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c809efdefdb58982f05cc0d74028874529d4e1618d1efbc3dc32c8ef7777092. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA8FO1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a88ee3fab9edfe3af09b85dfd22f774d3213d31d54248bbece03115d10fd4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ZA8FO1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49dadb662f83c6160f669326397e21500ce8a8527c12973675c56f68806827. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:38:50Z), 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/ZA8FO1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4093669a2e00072dc362d8c575d88a238154141a05e07d74aee84a1d7058db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:35Z), 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/TCAIR2458908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa2fbba7d811640def46a0921badf068ab72d9ea3a9ec121d70ea9a379b3e07. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIR2458916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5374c70e795b745ef56126b5b9be45d06c8e3c7844dede4d0636e35f02a23df. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/TCAIR2458922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c0e2e15c04170edbf8897d45a3c4fe0963caee0d93ba685d62fcf3e4737732. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAIR2458940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844047c937c75ab02a2dd7fda90966d93b705b2fe6c64ac8122ea44d48b86486. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:51Z), 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/TCAIR2458979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34631f6ef0a0f077c81b4c8607ea2d1da0c5d220d4e846144c62903e6ecbc5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIS2458992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f601a1f35f5fb2f24d09c4d91da81617de2647653a76c2c71d550e0c184177b. 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/TCAIS2459014.