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 0xc5ee62f60824d81c515932fd842dd73726ef93fe553d439a586b3c71d6c1f633. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76a15feb-fcfb-4b40-b1e8-9130bff7eab0.json and https://artists.proofprofile.net/proofs/artist/76a15feb-fcfb-4b40-b1e8-9130bff7eab0.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 0x9d702acb52471580a0ea924ac06db02a86ec215aa79dd9f4f1457b0d1ce3508d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNJV2049475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37678562579986d030975c8e6a5abba850cc016382f55ea1f9bdcc341c3402c3. 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/QZHZ51968189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f799e28c6ae2dbda159f1c58cb0fee60aa17be0d2630c323a892f4ad72700c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ51968193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505c57f9ae18e4d058b2bcb48d150b217c31de9c6eb237402c1a58a6e2366051. 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/QZHZ51968199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24b929230ca6e7eced1f6a4d0428572c645117d9a3f2c31c1ecc26f8c95ede. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHZ51968187.
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 0x6333937110a8360a0b5064dc26ed0dcb5ffb1592b664d453572e3d6ced28e154. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ51968190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d91f98c2625728ef271b4161ffcca2c9f23f2148ebba9ffe59ccf6dd08ed6e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHZ51968196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b89fa1038225ef041c4463b6a0ab9150cc085c382e30b9910c7cab695b2049. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ51970119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b6125b03851a86510ea93dadd94a40eae8d778626a3dbc5569971208f6cf0b. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZHZ51970142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b70935902e93f94e77c6bc332463ef568b03fddd9334e3cd1a9e024fb3281. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGLM2003361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf960173c3c26c978eb52d12317b03b48dc355d2adb1eae28973f8b6d37211da5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:34Z), 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/QZHZ42063863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070e97256fb41a549539cfe9144387be3791acf5d94dbcfc35164e1d417d7815. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEM2057426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c77bc4fd446de78e1b6780b78d6dc9ea039ff05d3d2607ec0b826faa98dd3. 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/QZMEM2081029.
El Papa de Los Metros (Comandante Metro 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19517a9492a1c59f78729df195a2bdfbb4a477aaf5feb94ab7e21e5b9b0d6b65. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMEQ2043696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69729c5c8c1cedec70b284af13afd494b06797c89280a324d796ebc4ebe8e7d. 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/QZTB32216142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb29d54a72b373d15b000f13c8e3a59338ca7ad01b80e8175e72991885b690fe. 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/QZDA52355605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f117eb0325fca100870533bb202fbe1f69dd58822cfe2bbaff3418d5844a9c8. 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/QZES92352728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4233ed4b35afc2f078c55494cce434f75e1f12c9354d8b0e47b809d9614fe619. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEN2340125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd2dfcd7ea9672aa961a1720a4732bbb283cf75e04bae778075efc5e63379ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2358472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02499d997da44a1b67b11bc829978c149cf06db8f8f25484b8c67a02640a462c. 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/QZWFR2342403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5470cd4dd8a54359221c136e0e16f282b8bf3c7f7c64df96423bb4009338c0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:26Z), 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/QZWFR2390589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9927dfff832faa7787385dc17b208899ffde4ab68ba6b6c521704546bc90d6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:55Z), 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/QZDA62404031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f737cb5877c698461307dfd6bebb3f74a4f803580aeee7e6e48eac0ad56eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72446391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb03e623cb1655f1279c0e23d3781c65565dec3546a17333f39a3eec8797496. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZDA72446385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a3737e8a297ee271500652738e30388ddf3bc16da84eda74aee66cabcbbd65. 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/QZHN72485834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7caf059c394a5e23ddda85cf9c11dcc154d8420180f615b1b8e52f5eb9a8bce. 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/QZHN92405505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe910927130dcf148d409d763458691866bcf44baa1748f7f7fe2171898a5772c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2417287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b33217f5bf59abf9736649b121f299877297e7d082600f982d3f3a5254b86a1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:32Z), 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/QZK6N2471560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fc2480630976a8019aeb4c313e66362fca9c234771cd04f530187e9e7fdc69. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMEQ2411811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c049dbb29e093475ac65fa1ddec35be532ee4a8eaff0bc3b81fef0eabd2b73a. 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/QZMEQ2411831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaac3b0b722e8c0b9d153dbe671b43d134186c487baf61291771017874c0fa6d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWT2410749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43743441ee8c54e1097f0cc1555cb6c935033f211a7eb292d4d75e712ce7b8d7. 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/QZNWV2486722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fe82a3ecf9c31a1befbe4eea6ec5bb19932ecb9651b1abe1a4d42f749b7edc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWY2438000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260805554c537a9e10b8ebcd931c0a8101677c36f84e3e58a16bae3bd09ffcc5. 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/QZTAT2415382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7cce1122a318f2105d89640bcf8bc0326ef7e251a916547987edd29ece6a5f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7V2477381.