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 0x004c8e7beb23c7f478bc0e6d7852296d13ba05350b08392046fa8e08f17e519e. 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/475660b4-81d4-4a22-82f8-82a2aee9cade.json and https://artists.proofprofile.net/proofs/artist/475660b4-81d4-4a22-82f8-82a2aee9cade.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 0x4783cc4cc6a2152850ee97446adaf07002153e20f5581fa2539abb7746587f2f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZ4JJ1719572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a5568531fd70d16fde8f3222800b779ba16407fff1fe54215cea1e2d795f60. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:34Z), 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/QZ4JJ1719573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f306a9d3c75bd27ab32497370cad388fee1b79d2615598eeaf88c789d0cb6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ4JJ1719576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f78ed38c7a15cd10aec6d611a3fb016f5181154007b416f84a398abc061749. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:44:18Z), 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/QZ4JJ1719577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbcb57ff0d44b74777dad9b072f55be17ecec84bf6eb8192cd49f1c25c28c98. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFZ72058118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f4c79d0c47bd40a0c11a3d8dda91e96096161e8502d106efddf961e2024708. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ72058120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38dcd41f596592ac30cbe7712df33293448c061194db4e01e4224d347e85832. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFZ72058122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5aa892bcbd9de46fb1d4385c1e1e8f82c165d2e6dfaae55c86d2de7c9eaf31. 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/QZK6Q2102497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb67811f019cb9f8465d9f6130485b48306ac08220a6f582bf882c66e5f5f9c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWY2179042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619018000148f70d8513ada09fa3edd4c9a50c1747e91a7d40e674a6492d60c. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZMZ92324508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b5136d29ab0ba0719567c5668a04ffe158896668f6515e5ad1c48e376ab76. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:19Z), 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/QZMZ92446481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5aa892bcbd9de46fb1d4385c1e1e8f82c165d2e6dfaae55c86d2de7c9eaf31. 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/QZK6Q2102497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb67811f019cb9f8465d9f6130485b48306ac08220a6f582bf882c66e5f5f9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:37Z), 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/QZNWY2179042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6a0fbcaa109c4a16829062a46b5fadf79c5a11c7f6d47b06cd5c6ae33f0f3. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZNJZ2472971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ff7f4ec450c73736d8b5867398b980648cf1f942ef839f1769d3af90513701. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTPX2398188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5619018000148f70d8513ada09fa3edd4c9a50c1747e91a7d40e674a6492d60c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMZ92324508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b8abf07dedefa07b53ca60214cf82092572e4d11da47db8ef2086c2fa7cc63. 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/BK4DA2515916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f95e5efbc01b18e32c26d7e4749728508aa63ad0d6b5463d5815236895abd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BK4DA2515919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900a8692bd6f621f5d8b075b155756c64564f1ddd833bc29909aa94e6459921. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/BK4DA2515917.