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 0x4b9e03350165d495c4521587efbf0ca54861ccc3fd1e4fdd476c62a9888a9323. 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/fc8ed4c0-3b00-4c47-a4f1-30504bb133cd.json and https://artists.proofprofile.net/proofs/artist/fc8ed4c0-3b00-4c47-a4f1-30504bb133cd.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 0x1a89fd94ad1695d2f2361d0b6e3a9980077b6ceb12f14d091151f9c95c2bbb57. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CZUM72100846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830eaf813423d28d5c26c62d6c98c8854ea85166c7d61b07afc0d8123f35f935. 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/CZUM72100848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca067a212f695c621225b5fe67b87b9802de76685359c884cf7b79b4670404b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZUM72100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5526335c5ecd40cf37037c9b5f892bc3c33f09f7b3132501f52b676c67e8f42a. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:21:39Z), 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/CZUM72100849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda350adb61c12744df9d356922e2e58621af9b7982b1130163cd002136262d16. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:35Z), 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/CZUM72100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b757f18b8cc0d679b472a04950f7730bb6cb0a19fcb9b7c0508ca88f0c138e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZUM72100762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce536a2ed6d7743b1c7d5ac25326cd89822b244b4f60b74ec36bd9f03aa4748. 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/CZUM72100845.
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 0x6673bb46b724882024a031f44c6b456ebd83d41efc54e2c64d19de0077cf4e89. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZN882130900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f17ebfcd5f2450a2018eefdc6e3093c22c606e864287c9ad0c3aea8e79d3c. 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/QZN882130901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e97190f527f3532ac583a0bf34ecab8501f51ea34bcb8472cd30f9a0169dd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZN882130902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468619622093344201008dcf837a5a2860862b8573feac22932d2b7602615732. 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/QZN882130903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c43ef7a36d68fe14598557066df9d58acd8cefe14f4558c40178712a196e5. 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/CH6542009488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b98517b339bbbe5a9685b8e196739b2fc624c509d127139dc06e1ca28f99595. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/CZUM72200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc0d8cc5ec7c70e63adf0f117307574d735caf9774c5473ea5a2c49b5fdf9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZUM72200266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a710d97f9d55c314c48e7f45edb477b50a4ad6c9d2c965bed87288df4498e6. 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/CZUM72200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae52a936773fc3913b4615cf72ee761ef3b70c959a2836edf687fb79e8eab46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:26Z), 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/CZUM72200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf2c2b20c0c2117832138ab4f9be1c94ac788af0325e733a92fb9f3790ffc14. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2329082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e17e9b23a990916fe27e9926310f085ea102c348e120dbb419a907ffdb467. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:50Z), 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/DGA092396409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d0e71255b62fca4df3856b0b89653b0d0b4beef42c659d361ab80c05bcba28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA092396415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72330df4d813ee5e9d2353e5ee1316d3321b61004da0425165712a6935c77d0. 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/DGA092396413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bfd55d8dd21c273353f6c5f75b98a711efddd96ae7eee78d44252115b08dbf. 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/QZYFZ2481032.
Rarri vision: A future classical compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1367ff11a4cb723094c4b2fe9a53cc953af29010b3684dabea0f1451096bac. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZMEN2246638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6a8f9741dc94f2b58733027753ca3fac6d280933044e31918ea81df8c6e2f1. 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/QZMEN2246639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a00cddacf06f0a6914edbbc5b54ddcb6bf03984b856bd60ca1e7fcbacaac9. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZMEN2246640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d22aae1e0714e42854566a19f8dcc70b02c312dd6ab2144fd62dd4f788feb. 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/QZMEN2246642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e21bc8d1f2ed57131626f546c095612dea7185aee25e7e1e010632c1dbb9c9. 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/QZN882241573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09459f624f7b7e012d6b8f97757fa33ae61de0039264e9eaa279e3de10ff1cc7. 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/QZN882241582.