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 0xcb460ea28d2ac399970ddf128f7df530829056b6411805fe97ff38f0c5517854. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/807e95f9-d97f-494c-9728-2d08d6f4d875.json and https://artists.proofprofile.net/proofs/artist/807e95f9-d97f-494c-9728-2d08d6f4d875.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 0x0183fdc40061cafce2c7c4461a379f1b5deeb00370edce7cc3e95fd63d2f651a. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZMEQ2469713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a4f7e7ef01bfdc692b9a5f3dfe15afb2e889754d49cd17eda3eeb8dea2a5cf. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTAZ2438715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d934e47ec21ed70c0b5b57bc5250f869d72bde79ef0701cf9a07992f75e58d9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZWFG2491102.
Te Esperaria (Instrumental (Reggae Romantico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078e49d1efe9766d3876b98a48689e1ad4d27a20e7178c0640464729eb5f407. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFL2453824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b954d964d8438f9e96bedc4c327c3678b13ff7dc4e94575055e3e8981b3906b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFK2492090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec0f81460cede40e2cee5a2d94a8b6b62a99e462f8b4b2ddd8d15d3c894bfee. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZWFL2453828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8893149feb8b905ae23d2442813b6e569910d7834fecd522204bceae8595952f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFQ2447473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3bd66888218db50408911dcfe5e267e51402c8782e318e8b70af58f88e2e7. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZWFK2493268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ff12d53a9b18fc3ab72095947d53d68b431ecd956ef04fe7ae6051e0d5de90. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZWFL2453837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73f8a870ba62dbc59943a2e742babc18984865fea2edc030e182bf138644df8. 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/QZWFL2424691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b14361858f79ea1311b21c32fb48ebc8bb2f9f5d44ce03d0c5ad187f0aedb63. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFL2427526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920dfc0fdb4f39642021dec332fc7c21cc77cd9e2d76b3cb8ce7d915957aece. 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/QZWFL2453851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd4206780b4cd95a4825eed9b06336bf8bf1bda47ddfc15b88e6e517e0d0ffd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFL2453853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca583dc2e27df0c21643f0fdace5da9e042e30b2e82538411b1adfe59af0f58. 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/QZWFL2432008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9c2773a368be620b365b7e752c8a83035100e9a10fbfa5fa5a79a49d8fecff. 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/QZWFL2435897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fd38c5472d39bc3fc56449c989947cb1dd7bcb28df3353edc76007cdd40c58. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZWFL2453903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3e4fdcfdc514e342c86d78a8ce8280bfff9f3fd5cb78bbcf02954cceb9c65. 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/QZES72553290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1299817762433557217e2dba16110c36e6ecbe4d5f7c6d04461052c39a21f3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZHN72520929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a9810a910939c4b1e7d36d76bffb260e7489216faa8a3af5258315810bb4d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNB2582349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a981c6c7d28ccb075f29f1b103b29e6d4dac6dce3b3fff2fc3a8e5cb854e388. 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/QZWFK2590205.