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 0x4e45a7daf05ca7a0c1be0f84bbe18ef1a3269b5ab534467b73c38096ee580ebe. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ce97034-646d-41c7-a3f4-2aa128778e14.json and https://artists.proofprofile.net/proofs/artist/8ce97034-646d-41c7-a3f4-2aa128778e14.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 0xe9ef9bee8e0cc0e23b1864fb9c63fdf06717f2ca957aed7edcf775e8edfc2752. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAT71104431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754abd1540191576e31b4d4bdee701f8ec797d0caaedef74a7eda5004b500731. 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/DEAT71104433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e15bb6e1d7e4ad561b42326771c8de94fcd6041b4c7fbd67d0fe041b87026. 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/DEAT71104434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98c327df86b4b92be139e1c2a5255aafc7ea108b10227a4aefdf94ff21fbd17. 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/DEAT71104435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7a8ca518aa931d22f72fe8c3c44f6d0cff7eb1f432455797428d0414924874. 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/DEAT71104440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb759d719e4684201d856104a32096076103ec8995976c47581b699acdbe1f. 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/GBUZW0800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e554e38391ae7fe41b00b1171ebb1f775f851ab86f3c5dfed7d6de4c8a5071. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBUZW0800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82578d76d5e7355bac916d4d04476227bca849d990be89ffd4294d0ee9827385. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBUZW0800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc3c633b40954861a60c2f9e035be4ca110a1c9a53952cc28c2acc63cd2bf7c. 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/GBUZW0800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a8cce7b0d7631c9d25d7cbdcd5dd36f7b374487c6cc8ffd15e794727fa1774. 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/GBUZW0800215.
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 0x08b9a04a1c90b95260bf9dc44d9f191dd43dff6ece84805abc3bb6f5e9d4d6d3. 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/GBUZW0800217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a39bae747046d42a6954d9490f28c88bf452a17953e94f6042d39c93ba4f41f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBUZW0800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b21c58396dd6794da933b52f887007adb21c125da7fe3c2d77fde25c5060e. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBUZW0800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1888630cc5054c8de47a086e999c8de2277f009162601bfff8a189f1a0efc5b1. 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/GBUZW0800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b68870ed3291b442243cb131eb8710e2fcc9234ff07518ca23011417290dab1. 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/GBUZW0800236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e8c3bdcf12a3d5c25c138a6afa03c3a0097a6fea36e279139764b95adc031. 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/GBUZW0800239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddab2aceb966f2191b42e4b0fd996d687f48f5521d0dc73cc9cd9da52e6ae0d. 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/GBUZW0800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5cc9381f692ea45d053eeb25d24e8fcbe3803ff502a91357f83b76325b930c. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBUZW0800234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22650cc2db310176d2931e217fb694aeae491bcdd3d7bd5c018688d5e365bb95. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/GBUZW0800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827bac88cf68701cd4befca285d3afbeb95c5910f5ca3201c2dac30f10c2f77c. 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/GBUZW0800238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7460fee28e70c8bfaafd8eb3d6196ab3ee49ad62cb2645fb91ab395078b1f5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBUZW0800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e040c02a9475b29026e3a598408e33cb7adfd6477133380fe5f2b5d236fdd7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBUZW0800242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa3c998029eed022ee0ae104bb34f8bab35ddd4cd0dcd3440508831e3ba314. 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/GBUZW0700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839f6529e1c7160228d4cbbf10a299547b5d5bae110adf9d44ceed182d6e118f. 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/GBUZW0700237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6950e8eaf7a6172b2f08862cfe9714007df7b271fa9f1f70f41dabcd49b748fc. 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/GBUZW0700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2ee7d4fda2d234281412db19fa8cda78b7629cf52ecf10975c979bad566e8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBUZW0700234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf180d30269cbee4c7d04c381fdffee22d1bebda2728d06b1a656187be29aa. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBUZW0700236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49da9b32d59444eba598802d771e58880ee3706191542f0fcb17c3ff70d889e2. 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/GBUZW0700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe06efc28d4694bf21ab09c70f30c33aa5bbe13319a9865944ef1e31e5f6eb4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBUZW0700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc66335f53023290494159d57605926ead9c31081215f5035b72e6ca97b7bf32. 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/QMFMG1526430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb54ce4320c21c1d07945643902f230af051130d1196e46c7ae7462e6eabbc3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMG1564817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5360e6fddb95a399e0bbadeda2bc96b2086ed18a16e8140296bfa821d3bd774. 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/QMFMG1564818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eca2079e48e8b86c91379fa27b7076e8ebfa44010ccacfbca4f7eea5c67f28. 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/QMFMG1564816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e97a7a464575bd58282df94536680de1cbb5f94173d3d3e0a3ce336d595c8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMFMG1564820.