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 0x625d95b6f0d82efbebe0cfd8543d2a68bce45d93ddc02d245452704e8e60488e. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c403f3d3-6e72-423d-b2dc-9f2be9079424.json and https://artists.proofprofile.net/proofs/artist/c403f3d3-6e72-423d-b2dc-9f2be9079424.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 0x83995b5bab45c5a9e96fb36ddf63365ddbb2252dd9c99de883e07215fdd2ebe7. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/UKMGS1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b21f5e2950ea4263c70b8bde3c99cc641d09073e4a24ec63efbcce3f9d0c681. 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/UKMGS1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afc1e6825d0e946914f3c55d6e875865cc2402067360209994c700841e7db35. 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/UKMGS1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7f44f8bb40c6efa0fc85e341079212767763bdcad84d404d4c5699cc47356. 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/UKMGS1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248d0d835712e50ba779d828790ad03bf6c5a497f944cc6956dd7b830c86c5de. 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/UKMGS1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89cccb66f40bfca024165c815229063a1afc869a33a9d7f983ed6e0193ea791. 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/UKMGS1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd445279c31a01dbbd80c797125bf95d7cc4cb4e8e562f189a03225275e60b068. 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/UKMGS1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7bf03cc834c10e6f1c731e74840c83fa237ca7d24ff7905e5936d93e990c78. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/UKMGS1900001.
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 0xf0259da3c9ed82751c2441f1d8ef425d1463a29584ffe4a3353f4bfc29628222. 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/UKMGS1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc4e7810fef3d204632764f04461067e86fc3170733ce1bfca1222dd254b2cc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UKMGS1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f291978bfe1dc7bb70054e43cd2885e2f15d8e4a624fc2820d8c4a1a8a0c3. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/UKMGS1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fecd151fa31247f0df333d04a60e9ec4ba864385af40ac11f29e827f089820. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/UKMGS1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3aacaa814d15aa48f62392f918693869805b9668f2682790c070b70013485f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKMGS1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb908a2309b53d34e23ee98976d616a774db429270b9efc943e78c59bcd694af9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKMGS1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45579216850732ea93f0d5c48665db951f07a0a47740ef0124abfd3532824981. 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/DEKF70911703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2bc70226c7c5ac94f33a228ea27f92f67f639337f0a82a6177442ed97fa219. 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/DEKF70911704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7f4842220c46185d62d95507b73609b583cb5760ead1db0badbb4393a0daa. 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/DEKF70911706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fab475dade0e2152ed410da96141dd51adda3c994cec414b0c07d1088732e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEKF70911701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4c933d14167c71e2c3e2e421238df548ca9b26a5be89afb5024de9f942b344. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEKF70911702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e61143ce113a96c23135b23e6dd9785e9e08b5fbc1b971b282b012ec32cd16. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEKF70911705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6540728534195915d10b2b5763cf884885a6109cfc453c8015f1c3bbf90f3526. 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/DEKF70911707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f91eedc287424516b3a8141cf1dd82889f3c55e1550dd6bb587e1c91791ce7a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEKF70911708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0911d2c9b4f070c95b20238b73a1b525e3fca9f8efbb5e432c81391b4f98f8e5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEKF70911711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8841d472c558699d4ffa0a7ee656bfea48b6bf95606abf33f1037177f9b79b3f. 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/DEKF70911710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ddc90632579a9c2ff64d0e2b61ebef6d3e9b0c0a1c0ca1b353bcc9af58ef97. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DEKF71416902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d7ad90f6513479213b845207e1dab0503686832d5ea39991f1f0111bad5b9. 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/DEKF71416904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a93a56dfd03a3c02dc42bcf1a97e80313b3f81c99fe377544f158726a51a03b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEKF71416901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d51e67e3f782cd9a8af9391a65fad8425a6ac62e8bc14c6e1fbcf888112cde. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEKF71416903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81634f7630e5ee024d787c7b45082a18533b6290c435e9320ac56731f12fc38. 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/DEKF71013401.