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 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 0xc312c2e337faf193077f7eac9872f27063d7be8f1c8846a926ae4bcbcd8a2bed. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/069bbe6f-4876-406b-99c9-82d30a81ff69.json and https://artists.proofprofile.net/proofs/artist/069bbe6f-4876-406b-99c9-82d30a81ff69.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 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 0x558ed511520ad3d89fa1c5d0face129c56ae82710af631aceb5ed18e1cbbfe60. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BCX8H2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658b9f0182b14d8d644d52e74acf47808addbc62108a3073c3f11e4a8f9c8c1. 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/BCX8H2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a9a2b60699d966d08d419dba546d95dfa0aeadd34fe06bb288c7ce591d198. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCX8H2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec7119d9c4f584e40bacc4eaf4e4b626bcb78ad7c0e4e988842d0393ee7c011. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCX8H2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b84dd6f4cbaa7e2de1f0c69a45fe6e359145f734093962f492f27a2127b5578. 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/BCX8H2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf133bc4bfac48401e96208b7ddef9395119282be3f4c1781b083f159b0d17096. 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/BCX8H2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c7da544f2e66260ad878bade62f2c068b3b4540eae372e06098f59eb9e2943. 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/QZNJY2149849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cabaf16616daffcf8367d82f039dfbbe3398385cc07ab6c8da0ede38092b54. 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/QZNJY2149850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585d89fae503e9b818da9c55fd0e820b7670b242ba92eab238aea784360082b4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJY2149851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178d559a32923ae056a0eeaf61ea5ad2569897203f2163182cf43f0834cd892. 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/QZNJY2149854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d89afae28626a44f1ee735f0241239510b281c1f0e1b7ebf6a2f43d0b97907. 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/QZNJY2149852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d462adcd78173c874462cc74d5968542662fbbb21855aa6f42d0e7fa85164. 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/QZNJY2149853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d90636878a0d209646d37fd6af569f36b903b6e5170e76d3da5c95ba54f6c. 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/QZNJY2149855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33afb6a182446c54e29d3557adca6649cfb343fc3377b036fe65b8623a1c979e. 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/QZNJY2149856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e30cb1da077b019e0ffce1966cae2cf523c2f20d1ec03b611e3eb47c065dde. 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/US7VG2049821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50d8056e3b2d6d279e9ebb22d7dcfd3b040b1464143107a28002af3777f4856. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMZ92257678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caf1e2df4f6c09db2d605a439605230995e8703d4ce70abf41e063394d8a64c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHZ51953675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd58e8486810f34514f53fa600decb71c824336988ddc4c64e8cc10d81248b. 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/US7VG2112412.