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 0xc28bb4076f64ec58e66af5c1f52321dc5b01e79794098ba7900eedd93377eacc. 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/27820197-7167-492a-8017-d6b61ab6d8f4.json and https://artists.proofprofile.net/proofs/artist/27820197-7167-492a-8017-d6b61ab6d8f4.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 0xbf7e4dd97a248174e0a5911fbf889f308ab766c97046661c4f120c194288762c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/TR0330601189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee821eda46f33109b1800e7f7b0b885bf4cdc98b46331c35e4ffb4bad7e95db9. 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/TR0330601184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97979bbf916790ebbbf4383888e0219137325b2f25307df706d01cfe0516a763. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TR0330604428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3302301673695b7867808c47bc31837440ce0b7c4802c9462673ccc63987d0. 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/TR0330604427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81d2bf9afad99ffacb132020a8abd56b40a7577d39e173fe3ea512ac1248b9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0330604419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b403964cbebaa6cc8836e7751c77f5542dc8324ec75533f89bc519c8c7f502. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:13Z), 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/TR0330706184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c33992031619d6022ede7e994007c0a31e45e5000f7611daff7218cb56736f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TR0330706196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d51e91323a1306a162e7256048216eeb305fad3ec7fd4e050ae4fea70b2ca. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:09Z), 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/TR0330706187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f934f45f95219e4490607f037558ae6fa8f14881459a4c0dc1ae090d0e02eea. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TR0330706191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446cb5bc8c14e247f707281adb55a4c1a9d1f937177a20c540200a53c9f322a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:32:46Z), 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/TR0330706195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d83fdd79fdb09577939331dc46d5ccfeeddae80097b41aead8346bc75102877. 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/TR0330706193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdded25bf901186017012f3b334ad35c9b66d5e521b4a0aced3624fd81be6aa50. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TR0331209040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecabea409adb959298bd325a3b4bfb92b906d4e0d5e1e8274fe86d7d1461115e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TR0331209043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8286a895c74fd247e30724502d5635042c0f8e622476db489cdaf22a0a36a6ea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:15Z), 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/TR0331209044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5094e241808513b1ebf17c54672cde4d9bf8ff6631ba77a71861cbb7a9b357. 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/TR0331209029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c1bc07b0c1120eb1c93b48294f5f21e4f7de5806ca5e1d9f5f9685a7960de2. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TR0331209037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331f21b73e0a97a5ff6559f9a850d114d68a903829973edbe0c791ad9b5aa5fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TR0331401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456831637485026ace1feaaaa3c319b513a0bb26e927b8b4567e46ffec5d0647. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TR0331911545.
Vuelvo al Sur (Tango for Violin and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2285b9883122b13c00c7ece9f8e2f9077cb4010f88216df5a6f0098a9003520. 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/TR0332212935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c01696014c68848426488d56eb83d0c694e1b56bf27e589f1cf820d4d67d2b. 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/TR0331007746.