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 0xb0d5e70584ea65107c3ee3949833fad071ac960a7642fd6fa7f5147495665517. 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/23503ee9-e2bb-4e22-9ed9-6e8dab0091d8.json and https://artists.proofprofile.net/proofs/artist/23503ee9-e2bb-4e22-9ed9-6e8dab0091d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beautiful Medieval Instrumental Music Vol 1
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 0x2e9bce94190c6015bd36cffbbc50d4159474dc99434de6d60c84024ac606cdc3. 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/TCAHK2306522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6b03c008ac9fe520775d2bc86da63a3ed4a176b6a53567af502d15c45f398c. 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/TCAHK2306524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca908c107b1c848e271cc689112e98ebb0fb685bd239af66b917663d474723. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:12:20Z), 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/TCAHK2306525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a9e4a4c726c80c4fc488e3af45b28d463dc97409eb833398c0e60ba6589ed9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:08:09Z), 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/TCAHK2306527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04974e03d5317b0c17f5227fc89008e2e8b099d553feccac6893c5f43ed2d165. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAHK2306530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eb4a1fbdb956031455616cdeea9686826baf30b5a730087acb8e363c61bad3. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHK2306532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a68e446c8d5b6e7bf9cae534b5e591ddc44a93a2f4cd81f7d933aa5a7681054. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHK2306533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593ff87a77af1ae0ef0c59cc3d46e7d7592d12b00142dc0c672ee37c61896d26. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:19Z), 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/TCAHK2306536.
Beautiful Medieval Instrumental Music, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585873a8b6fe6d5eed743042bc50e4bab81e89556e3629468b8264ea444a157e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHJ2366706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a21ce9c3b8cf34733e132d4a0a4e6bb19481420bae8fe1bd4fe8d4a3835999. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHJ2366710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56253770fb164d450d6d2c467a8b007a75321324652c3a19c30a71fe8b394f8a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAHJ2366713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6830ebd69365d8d9933132fbc1587fc904b6348b97ec457acc1d8c572e8f0c14. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHJ2366718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828639dae521e5b01d70fdf8087d5fbd5cbec25aa325ae2910e4fd876af30fea. 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/TCAHJ2366722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8437e9b58342f2c55f1f35ab29abc9eff47ebe2cf8c07c0b44bdbdf927169d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAHJ2366723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58743befd5a7aa2a52afdd61d22cbcd7489f530ef945464f24606905c3b1384. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHJ2366725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ad9a84ccb05ba7aa667096517fd7ffed9172c49591e23ad673023e36043b84. 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/TCAHJ2366728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084236d63f0381d5655697cede89943d2b9bd3e4396b13dde8463a51c1c3600d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TCAHJ2366731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca07bbec7f67f0f9866f7df12caff370286990e76982026cd8d945efee870424. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QT65Z2550819.