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 0x2e073c1f3a140dce7cd7d60f6cae280e9ae1a04a1d460a303dfc7bac7197ed8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/926efa0d-ca0b-4825-8a5c-77e4284e4593.json and https://artists.proofprofile.net/proofs/artist/926efa0d-ca0b-4825-8a5c-77e4284e4593.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 0x1ba0acfd95a22a94e429ad343f666bf10c0a0913d6b9fb2677990f4f068552e1. 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/IDA832302595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9a18635bd8bb6e029e26f942ba4452a653354d1cc23bbe1c9ef79b498ae9df. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/IDA832400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d228d69ff2e2b862454b0918dc2f681ee8a7d6214eeed88b261572f5a7dd287. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IDA832400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd199a2c0e733171bc173c558c8b2066353cf2c2b87db21f876dda8efe663cb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IDA832402542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee753e1b3d33291943eb04d8fe75588bdab4e47ca6ad60b42d98922f1d6cc1b1. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/IDA832405622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409816971b7d2ca66ad236b6916874fe02d0f9b2efce4abccf1d0be01b079203. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/IDA832111463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fb87dcb8f18c94bdc627661789d862c73c9d7f158c30afb33200a561f3ded8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:28Z), 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/IDA832111501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5281227101f53057a803fb706e46b1d28bf64c039d7e7a1836b777c70a1c04d8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDA632524526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b027b9498dffc9ecd04deede82426c10edc0faf2b62f6a3495b1df72e931dbe. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IDA632523959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf8dd4d7429d2fa3a3f25e9f9efe38ea3dd29d45deacad424078831295cae71. 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/IDA632523968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da8e30c89dc61b2e2bcfab3e85a13fa9d5793b01accda4da9a6dc52ad24a75. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:14Z), 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/IDA632523958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb1255cb4c83f0e5eac2d1aa79ef2af1bebcc76bac0aae7dc13122f2fbdf840. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:18:19Z), 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/IDA632523963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a0cfea1b70d8dc393828470f350b1ce3103fab4041aa2d679d181118809ab. 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/IDA632523950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11deec5472d00de78b47d2b413e8944d1743a7177072085374c571d300ece4be. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:55Z), 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/IDA632523956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9511ab586172b60fba2a8672a326cc9b0ff7933b95de46d8a79187196a48347. 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/DGA052536521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35acd3b4329a55cd34e43db7456667f615caf5def5f62e3445d152a3e28b2f57. 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/IDA632527267.