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 0xc3adfb3ff5d70be38c1c38e422c20ee58a9c2080f9a4081b1a6d86adaa0a1acd. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a612941-2ded-4665-928b-4239fafd12d4.json and https://artists.proofprofile.net/proofs/artist/6a612941-2ded-4665-928b-4239fafd12d4.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 0xafb09b3bae10001403ae72d7545e574a6988bf3f5e12bd2985b02a340edb4433. 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/USCGJ1831537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f466413681f304ee0ace7a14b931060c385fe3ebeee9c5c5f89e2ab3c7d0bb. 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/USHM81790311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7625bea2919e51e2ecfb2542f9506cf8ff980380a978d999c01dae3f76132b8. 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/USCGJ1831541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7dd1676e8cc15df3a1fa1397f37c926e89b1cacb36d7103acb775ca873c73e. 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/USCGJ1831542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d48d863e1153b33cd00013c4c6830ff7ed5242978d55a0f50897cdaae20fb42. 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/USCGJ1831544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9c9d2c5f281dd753591d0f016a5f9878d38cfbdb2b22fe5c0b8afd00d3fe3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:18Z), 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/USCGJ1831540.
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 0x6b85b97e1aa2e055936ea108406b0040c6da62c455dc3ad3bf31e6299041f686. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USCGJ1831536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f767e0fad65e48661df6d3d2de1111d0b1359223d5b01ec71ba9111de94882. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USCGJ1831538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3104a4fdc86217fec4b97d7b42bdbe5b9bf92da4ba95b62b51557da1d107b5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USCGJ1831539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d419548c2ebab3456521f7d140265af867ade7218f7396517d05e418b5d1edc. 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/USCGJ1831543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53f65f5f0d5a4fb8286d700c777129d41143a1fa7e626aa3a107319c42f1ac. 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/USCGH2105595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b1d11607d0d26f6e2b2b1096cd0f4083c473ba81c2bd8c32c0aad383dbe2e8. 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/USCGH2105597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d12b7411a2198462604fb01ad08c2d848607b5fe89be1f970baaa29c8235c9. 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/USCGH2105598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e1dcc8bc52e744c70e8b9d9ecf408ea0413e651a66df182646ba29d0eec8a. 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/USCGH2105599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dc0bb563f695209171be871319f043c8e4d3eafe7c9902d969ccdbb38e3f6e. 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/USCGH2105603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c46b63ab42d0bf0e6c71661d32b78624e204f3794cff7461b89c5d39c274b7. 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/USCGH2105608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453aa61d18ef2c575e1f1642e8fbb4c0e3ca8b58fab996e24fc4ce5e62422cbf. 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/USCGH2105610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988b10a370c1efed6c0c49b6a4cff12decaba6664b5f6dd6b28621b0574b53ba. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH2105596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b670b4dc60a7d4cd8d7c8b0a61044816928d92e0b71c5bbb27922c3fc8dd32f. 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/USCGH2105600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35be3d3dc9a381dbb09bb68e2fd3d1ec209c1ccb3d32b47c747e8b2ed62898b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USCGH2105601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73c8db814a3627cccbee9603aa86c5e4f62eb31461288ab878713f39b6b0761. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH2105602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa281712650a13d981978b206fb5afd669ab8af1b014cc794ef550bef4e6e4440. 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/USCGH2105605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842ee6fc32617c91483fabacc7729ff480ba45ed9a61fef1d750a83170c7074e. 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/USCGH2105606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdeae750087e9d0f8b2a78018020910d114904d67a8cb6a35d3025d7ca26460. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGH2105607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcded0011bcf395cc0e05298ac41c87e4e4c85be1de420d6b790610aec2ca8ec. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USCGH2105609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfdbe83950548cf47d65a14c7d06b34a1ed6968384b0094b2da74e98c755c49. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES16E2300582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef101c4f5df1ceadb5f3486458b224476c99567be1692f3c85ecd620f9fc007. 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/ES71G2152458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b5199d85bf7c361694e7ef80d5aad96d0008ae6e54c9e3b7d360b112856c1. 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/ES17E2100747.