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 0x132ac03f04e0f95eafd87bbb7865a26f732e270807e1db9a4f506ee58d07a327. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbb900e-9279-4784-a8bd-b8e7210e6993.json and https://artists.proofprofile.net/proofs/artist/ecbb900e-9279-4784-a8bd-b8e7210e6993.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 0xbeca7548a52cbc15d4998628fd5b2feffb350d7a47ab462a4a9ab137b40919e1. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CNZ502200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b01af4a030b19fa35aeaed9c2e9e955770898ec3ce5f24833868661720434. 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/CNZ502200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f11021c1f8205c8a7bd16598f8aeed8c9dedb382917351906ac23d66682e652. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/CNZ502200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af44106f4b9f76fdaeb1c398a2e2d0e4b0ae49e1671c2e494fd33e3b550981a. 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/CNZ502200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b560bcbc5f40733a9b93d4fb53a19494388130178ef9ce78c246f7c1a9276. 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/CNZ502200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0018f7fb258023852b0d9debd77b778e04505a4d007698946d7851c4f615c. 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/CNZ502200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3b557b6c4f37dd7f9d0629d3b39db805600b1388ec2ae0ab78fe4077bbb0e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CNZ502200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8ea8496b1f3e8ae882a1d3c594009ca17ad4501c15360ee1c495280873748. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CNZ502200290.
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 0x9c8e0fea677ff807b4d72c5d5970d690ceaf08f27f1eb7593d25894b92ad9196. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CNZ502200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac354dfbbaca332e6365b31311bdf9b390d856487a59d3292b9ae658acbd21ad. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CNZ502200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0572ebd3803e224442d384a3fd47f3af6f6177adbb56460c9e32ec1ec2491a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA062403518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1170647f2502b735a70cd3d10e02a2dfe2996caba0dd94ecc00559edf91e1d8e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DGA062403519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70f7929da2b3615f9ab170100a6bac8bc75f3b4c58034103f9485425eee5de9. 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/DGA062431612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcbd2dc700e4f78efc4bea1c6adf958a7049d84b6b63ce5434997abe6597588. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA0H2373367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a9c1873b16e2792ea7847bd0e32ecc2f061252fc4bb59d6087056fd5b0906c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R2356869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1a3440095a38f84353a433360f0e545eae0d2ab92d9cc395cab19b0af9cbb6. 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/HKG731792090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a3abf6dbe3be98d95b259d62ac36cc7f2d0a5b6c7b4b1650a685819e6b8b67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKG731792092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aff8f157ae3a67069dd4523c228a3a9df12ba1082ec25ae03a4c4d3c06f90e. 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/HKG731791937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1679ba5fc9f5c081d2a6fea712559c8c784680e79c880a69ab868b388948ad92. 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/HKG732114674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd32f0e2180a62546ba657e416e8ba1157985e6440901f826a3fae51ad86646. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKG732114672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498e360b0913733bdf8536f883500e9925acd6d218361b7b59332d248eee35bd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG732114673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82a9b0d5ea8116b74008a2059448e9aebad6d779dbde31bcfaa4f0b5d8d590. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKG732109268.