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 0x67e9dff8ea011a90f2d3ecb17df2bcb7ba5bf004b5a598ffcd6ea9fd0f944966. 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/0eb49f92-cdf8-41bf-bc49-ee0c117b1d38.json and https://artists.proofprofile.net/proofs/artist/0eb49f92-cdf8-41bf-bc49-ee0c117b1d38.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 0x23dc18611f39f60de1c2696c11138530fbe1617c61beaacd53ef10e8ab28da3d. 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/USLD91764638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24cb18eacbb8f8520ab9f86d83c5730a35e058d9d512146ec92228661dd99c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91754125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e7b5f1c441fec8edc574bb90771daf3a5548fe67375eee1a24f6fb1ad67af7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLD91764639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa87503021f0389bcb2db156434831ae4ad61d785398434c8b716ae5d2db9c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91764640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b4097d6bd443f130e215eb3c4cab5661392c8638a097f37789a0d3c4e97b0a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91764641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2b99ab878991d32a225f032947c8b3acba34266bac5cbd1cf4596dbff910f. 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/USLD91746723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467cfc856cbc688b3df9a46abf154473cfdb07359481b8861f4410eb809fd67d. 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/USLD91764007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b718006367479a2dd5c2544e78a47103364649fa69e235c9a6e661ec5908c8d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USLD91734496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8934e653de096e7ca71df98f95415dab75fd894b2d77ffb7bf92e140ceddd4c. 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/USLD91734497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc604801f9f8f00bee480f2a220c38d32777c9a2b11e5ce019e762d826fbdbb9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91734498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990c78ade5b7454f6fac06e30995e94e017d45ec732364b294df48c00f31185c. 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/USLD91734499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af8274da61fd1579968bdc1cdfa0b8929c8a6e4bdafc5a2f2d30edb5721c1cc. 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/USLD91734500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bfd376ed08d11e4cc6759b8251b5724471da4947ea48c917be9219d2739647. 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/USLD91734501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467cfc856cbc688b3df9a46abf154473cfdb07359481b8861f4410eb809fd67d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91764007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c24cb18eacbb8f8520ab9f86d83c5730a35e058d9d512146ec92228661dd99c. 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/USLD91754125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a99034ff5d288d15341467f7bc77130566e504e7d62f945105a84a65a32215d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91741795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eab34fb98085b3440100fc82cb74ab37ef982029a20e9b1ef10e12bd8c011ae. 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/USLD91741796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1992bf84f56583cb21b147d2d0e991ea044b2d33c4d2cb8069422f1f4f147. 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/USLD91740995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd44e4c83bd466c7a8104a4aea860110d8f9bdf924c6259dccab0e76783cb8b1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLD91741797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3f75bab44b00c3762064a4b753d49be0446bde99b2d66b3e945f5027e51e6. 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/USLD91736291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1992bf84f56583cb21b147d2d0e991ea044b2d33c4d2cb8069422f1f4f147. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91740995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78af42a08af6bff32b0d1b5de2e1ad1e66539d3e808e2694469f4b3d5e2ae1. 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/USLD91738829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3f75bab44b00c3762064a4b753d49be0446bde99b2d66b3e945f5027e51e6. 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/USLD91736291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd9ede84d2afa8c84a5f05f4b79d80f1844acd3f414b8f128ced7767dbaeeb. 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/USLD91734002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca89b3abd146b1587e2452950643d168e10262a15dce5fccac2239a3d730e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLD91732335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219d102cc83a57c8126e2086208bd14dfe6e63b8b624fb8162a1eece0027a2cd. 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/USLD91729821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ffae011cfa6ab85451ed8cc0f9e973b2fbfbbd77e838e5ab03da04c48e505f. 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/USLD91729822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6562835a51e9a6b6f37fb3767b526fa738324d3c0993030c218c93591a6770e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91729823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b312f6f9a670d0eac0b723d2d79dec75fc3126ca6070a9b2a7de1a86d154b. 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/USLD91729826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44457de44d3bf3fe5c5cee5b8a72a4996a8a6a24c37ee9ab51f8f1da1371281a. 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/USLD91729206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d54ee11a8b54806290e2a80173a8b708d3ad48956646bb147d75572fa2b176. 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/USLD91728845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5eeb477208a3ed06cb0725dbd204206cc3a7811a3717ab1c888859a67618fb. 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/USLD91724629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa179e8ca9643fce2b5278c94a5d82e528650d21ca2725f5ef542e54f5da7213f. 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/USLD91719660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bd808e949b7dc65180e4b4f35837c41cf91cb421449cb8246e048e21ab1d7f. 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/USLD91718732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aefcaa253387a65ddb8f227ec94800dc55bda6fb44e265cdac7ac7ea0f29a8. 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/USLD91719661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6cafad228064a3f6b067ca56b029cbd0c3eb00ede31506ffcad46731692008. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USLD91719662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bd808e949b7dc65180e4b4f35837c41cf91cb421449cb8246e048e21ab1d7f. 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/USLD91718732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73338287d85ad1714e21f6278b431c9427edb113446d2bebd4ec02b05b285dc2. 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/USLD91718155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd655429263aeb336721515e9d6cda70d669efca7ed96537af10ddf04802b77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLD91728675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3a77629632b5a1b98cdfbea196c70f319d865dcf9f6b24979c3041899b3f59. 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/USLD91728671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195fa8c9d3f082f4c4fe16da47e7ff0f7d0019de502bea5e9251c174147531e2. 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/USLD91728674.