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 0x19751eb82e335444439d07edee026b76629f3fae59a16bd3a1738e6f975c2edf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/335aaa33-ca76-4edd-b147-74c765129c7c.json and https://artists.proofprofile.net/proofs/artist/335aaa33-ca76-4edd-b147-74c765129c7c.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 0x14387b2ad8113adfefcdd562e6048f85c60c5bca4ab762bc8561037f543560b0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US83Z2049099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065e93c52094894e2ecb0ba6fb3d0d8d5d9f630e0050cb36f77dfa5b137a2f7d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEPU61806002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42feca90200e624de8f0386a8286fda17162e3ab4ccda0d0f0f7bd5bfcf28c60. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US83Z2127568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddba4e226b5a42ee4dd58a81467d62fa07c257e1059d7faede01392589abed6b. 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/US83Z2127571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a783062b23f90a0429432760e0cf91ef44f54b5161578e10a3163cc0dfce2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:34Z), 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/USA2P2209487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d590408eabb992001fcd10c4a20a5575ded5f13c3d8725c092fe3d9950449dc. 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/USA2P2209490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f25a81bbe3655a26af555f3342cdd1efed0345c04a3ca512f72d6e238531c. 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/US83Z2210913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f25a81bbe3655a26af555f3342cdd1efed0345c04a3ca512f72d6e238531c. 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/US83Z2210913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83bfe660acb5bd5b523da6a49b9c1dad0d13e3fedcaf788fc8e91bf1863a079. 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/US83Z2322083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf20cb4e7b5456ffb6e921f568de41d3c85901190febba81a392a2382d9c6516. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:51Z), 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/US83Z2329273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4282ce601347c2cef590a31e3f0fb52629ac2f96eb7b74875058dee5e18bd88a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ITS252400013.
Back To The Old School - NoNameLeft Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb19b8d482393a85b4f03c4812ec55049f3afa2bc149e8c4906a631b6e97fdc3. 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/ITS252400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97cf610e217677ff16f1f3b60ac0db49fc6731a044b87e3da0adf06e16ef6e7. 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/US83Z2407310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f4b84c2c955c20c44e2b1229fabbdb041ae0255b50cfe63adb5182a048659a. 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/US83Z2407308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9766051a13917e9e63a983280215d6dfcae4262ad2d8a11ef87e44460bbae9. 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/US83Z2420763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c159cc735634530c3c4c45270ebedff5588a88320a0ad4a49e68b8c2a30680b. 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/US83Z2429751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160cb84bf07747243c076caab2bf1225cb03b7c215c6e53b201ba56ccdff1f00. 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/US83Z2429750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb510726307ccee121359232b6478e6f7b3870d45c9bee81f24301156dbb5c2d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US83Z2506935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701db0d240793ad4aea09ce2decf80cc41005a62a56e0387928036c621b02bb0. 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/US83Z2512241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61ed5b089bc42ad526e0138cf3b147e60a60d2f77ca38e4a17b96a4895a9ff6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ITS252500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef83f7fa49f453818eb04696f40d1d1593954502b5c008a1491f18b3a87b779. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US83Z2541737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d45c687a78ee65b4080a1375230082a820bda6bf04dce2dbcdab07f59df63. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US83Z2333746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e74274c10eeef3069585f021205ef3d37fa8123524a0dcfc0eeb295b6e690. 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/DEH742035813.