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 0xac9852c1c52967c2265f86e7534f725e9028fb0104cc7775388872ca89b7883e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8295e3a-db87-4b06-86e4-60a39617ae79.json and https://artists.proofprofile.net/proofs/artist/e8295e3a-db87-4b06-86e4-60a39617ae79.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 0x9a853e8e03f5a4d841d62df9c748d2a83b12f14770ba1de727da74103736ae4a. 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/USHM92035586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39217de29a85aa7c12d88ab3345366cfb00e41c7cb0dd3e92b81d14f933e0e4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM92035587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd930241f83162dec6c2a4f64a5b485bdaf07846560ea9b4691227f920c7bdaed. 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/USHM92035588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f16dd7b0643b24fdcdebef89d905c7c2fd489ed8b7e9477371a5090201a03. 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/USHM92035595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9354582853709a5c20a7b852c55671382f137ffd81dbfc6ebc37de27034189f1. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ARZ021400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ce199ac82058c8b8c496dea60ad0a3fe75bd8cbef5d6bf248ccff2c1a98a9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARN0F2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2cf02d2337052eaf7e415aedaf3265577ef8d912e1e0f7d515bf7257cf38d0. 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/ARN0F2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca869150a97096a7570dbf0a802c5d39ef4ba25d1fd8d0775842fa9d5830dd. 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/ARN0F2200001.
Velay la Algarrobera (Arr. Darío Barozzi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5e478fd7c0a358456e7bccdac943a37ef5a181711913ab83fcbac9328dfe41. 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/ARN0F2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4caf4cd1db1fe25f08b5b84344253ffdaa3edaad0a108ca904e1d311f1bcef. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ARN0F2200003.
Raíz Spinetta - Versiones Folkloricas, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9066c9ac383fb557900d49f0794535667c66408ee23c1416f83e3236fe1ab88. 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/ARF391401492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d7f8eee10a690a540ac877d2a3b8f1e01772877e32082dcc129ef61cc83fd. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ARF391401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616a604d37becdf65ff25a6cd839648a562ba2a6be7b2c50da60ab5f50eb16a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARF391401494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b684249ee7d9edc1124524787096a3c6431f00c9e8453c245c204e855d23ef. 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/ARF391401495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1593296e7c98c468bcd66f02bfe5cfcf8a5bfae2db68e385b0b50331b4c6886. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF391401496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af11b0b1e08e6336a3b0cf74273ca114ffbbc0fc77e0ef80b71eba6b1041d2b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ARF391401497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44637165db4c4f31ce6558826d7c59148e2da05d6b50f3e3aa25a2825854f043. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF391401498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4caba485326cfec996590bd6e0576d6947fbafdc49f5c36b16962817c29f734. 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/ARF391401499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b73783bf7f7e69f8d9d829b20c260f00a337bdd2af827434adb0c671eb259b. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ARF391401500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2e94e544a5e4c7175bb8069da4e95e9129c15d822228e34eaad0a34dc2d3c8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARF391401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e57222f43f43fe21b5f1b53a4e2614ddd5c30b43df4892bffcf2252c012380. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARF391401502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae20f075ea525b9306946bdfba07e93f8cf178e063141ed85f2d320e759804bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARF391401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265df3bd89c8345cec79e27338cdbaf41b87b6b0b28aaec47862c53cd9454b5. 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/ARF391401504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc3e7bcc32944183acd1908fce33952ea89454dc3fdb5450702017439d0ef87. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ARF391401505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a890dc9eb61565bbb9e7947d1753661669c8d67e29950152b1bd50f95eb4a0d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARF391401506.
Miguelito, Mi Espíritu Ha Partido a Tiempo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c9e9ab609a720a8f6ef201d7640326c1d196c93e179c3562c3c79303939a64. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ARF391401508.