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 0x818c0164751de8ec1b66654cfa2dfb741115bede062f4fe61e36cfe99ba1910e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fcd4677-16f2-4c89-9896-53c69bf24a7b.json and https://artists.proofprofile.net/proofs/artist/6fcd4677-16f2-4c89-9896-53c69bf24a7b.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 0x8dd59e68377d2fec4f15d5aa0fdc604cbd605f1d6133f8c3d44b4e3693474ccb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USCGH2245887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971da48cdb19f8c1b7a6bd699e05ca4cd72115cd31c4d2df231fca86fae9a760. 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/USCGJ2350634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874be7d53a42b4b47953da652c17d3af30599a67074f0577f03ea23259d7e816. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2386834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7903f745d6b47c588821dd8fe76cb10e4220b7ec5f2ba0ebd59d176f8253a5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USDY42361288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba242d9362abb4d959ca04c8f05c1a0097b2a4ea23f4b7a6a5f385c61f180bef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USDY42362061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94db64bcdb6e4e268cabf733d324e933b4965447edb413aa11d592e67fac7148. 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/USHM22342185.
If You're Gonna Bend the Truth Go Ahead and Break My Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fb27d02223412909ad4eb72d618813378d592b2c292e04dbb049faee8abb15. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USL4Q2363827.
Sometimes It Doesn't Feel Like You're Really Gone
I Need Your Prayers... You Need the Practice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c023518c733dd8385859eb4769f4cf812abe7012c5e0517af2efa9b6548ff38. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGH2480006.
Calling It Your Job, Don't Make It Right
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363991ef9d1cf0b362bfeac8f4198664405853a22c0599f9a1ef798522ca5145. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/USCGJ2471969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87f20fe4151f1bc7dcf5fdbd73be0613427e7056d65cc592049ee31fa83c2b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USHM22408868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18a4dac496d4fc3be5ccaeaf787f646932ba4b8316b511506fa0d48078b449c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USHM82496017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ccd1e20a027dc3a7b787dc652a14a91a679d9aa9072aa245b5328ecb180358. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USL4Q2458617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25af5cbc489fe03f052d5c59a7a5760a1ce59dfaf04d217b7bd0477af650102d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4R2412567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045650b3b8726af05df22ef7406e4b8d155d5cd0a876184ce753b62e2bd9fdad. 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/USY242409161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d457d7fc281899660bd6d895ea3995e4b63d9085eb42ad001b71e97b79a126d. 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/USY242437014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae668023aa796b35355a628e9140fb5c5385b5a39a193d86774fa5f249b2fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USY242498567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa692a45922b8b594e3372f9dced4a77f6e03c8624a207f5c286468c32798fba2. 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/USCGJ2529841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119fac98c18a5fd15da656f700649c3b388cff3a9c1dd89c73aa1408d0efd797. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDY42516595.