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 0xb47dfad02c4db1c6ae1342bd3458ea1c8048c9b145f12958eed661a83db3017d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a3d4f94-c779-4a50-bb3f-5cb4294cc21f.json and https://artists.proofprofile.net/proofs/artist/7a3d4f94-c779-4a50-bb3f-5cb4294cc21f.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 0x7f03d9fb2dec9bcb2233749d13ea42de5b4a6605f8f316cf953b0f3ffb1f2cd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/COF011500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62828a66f463caa8dd266026a639e7b126199b855fc9c8087c157bb35fb5c4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/COF011403230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf4505f3ede61fb74ba84e64436857fa9b3afdfc597eb1e5d57da0b3e4fbf96. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USDY42157113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f15e429c3625ec97876d98e8320df5494c300a2da0b8c843a4848c806ded4c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:29:48Z), 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/USDY42157114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2f1112d98bcc2285bd781865c2a632fb138efe4df370ca6d928d36976fdcf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USDY42157115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72703e5a4db10aa653feef6ab6acddb3b6dad9b5cb8cf4810efc837066e0907. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42157117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766db0b03ea2890f0183aa239721d6afd1baff684f748b95c98794d2ae2de543. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USDY42157118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c89949c51da24faac13dade85a1480dffb266cd1b7f0ea4fbfa12abdeacb88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USDY42157119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cced66e61134f1347a7a03404c2088340d089d3afea826577f4625f2b1189d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY42157120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c90665655cad8e8c860621d3863d6697b22eb4c4ae6731d73d79d668b760bd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:38Z), 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/USDY42157121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5ff1b853369c66857dcd27eb12538fdeb4bfb12dde488e31c4fc331d8b0871. 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/USDY42157122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af8fd2a60809d8ce9e838c0c4d59d2e2be1bff14919e8b543ad7878258318e9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USDY42157123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad22908004338441ee4730a0e85de445b23b3ee9b3a0020ef652a096175b57a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDY42157124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68fdaad6d3262c9322eaa7e75e88b2717010358e665d6c4d83c813d6185c0eb. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USDY42157126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12830d6dc277d4d19cc5a360c2a67377f34f60405f828c487872a1c1057cc9d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:45Z), 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/USDY42157127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6864450a1e6e5ee89deeda3b7a174e97dd419d8c0c03c41a004c42dcf57cf7. 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/USDY42157128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bd2706b92c38977af60b4062ca56163f5b461db8c647ccf01c7eed984f50bc. 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/QZMZ92370718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74995525f5174a01dda1f4106ca8fe1d4ad22c2d308c3cc895dccda218095d7b. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZMZ92370719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb73a35a040ac2ff4cb979eb9b9e74c35c35fbe1a889d5cfa4d11736731105. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZMZ92370720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced718aa68bb49920942aac64b70b03ccba0cb74023fd49cb07333534168965a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92370722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc17eaa8565dfb24eda09b1bdbe9fe1b6df912108818149dd65830e2a8508f0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMZ92370726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf2e1182edb41f61e2b9a2d34ac900d6c8d3369ee8af39923d078a7bb7cea3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:58:37Z), 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/QZMZ92370727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102ae0c73e96aa74ddbbc0e32f4e14d79789e9b015838dbee90b605c7d13db6c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZMZ92468405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f146ad201bd50a4b4e495d3e6971be8b91fa4268f74220ccf041973ae0a0795. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:03:09Z), 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/QZMZ92468406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ea93f724b968dc8bce724e0fd2921725355c88a3c605429e090483249b12ab. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92468409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b14d656cae31975a1a4e9541ab9398bebcf4c335833a85486eec94123f098ae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMZ92468410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928d321d8cfaef6f32edb9eea608d412259523e63585c66093bdae55e0956297. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:42Z), 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/QZMZ92468411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f7f1181d5d1c737d38374f32eaa1a56b0e6e67172ac0d56019900cdc6c748e. 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/QZMZ92468412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd82f4c35f8f68a26c1e3439e4ed1981ff4b5553371f16d3b0dd5d94f9a48a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZWDW2465110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff5fa9f36d7aac8dca5c7a0e85d93b14e5d599536402352d6ff46d03bf321c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:03:57Z), 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/GX53U2653430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b606e493c463247b92bb0bb58cf43419ba06b4545eb426627954389c11aff6b. 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/MXUM71702012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56fc418ae992f9607e4c9cf7bb55e77e855dbabe19a6b38124a1bd9ac529062. 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/COC012034099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20b517193022884d0b70f3f7784e7200e01145c272ac48b7c45b66897349b3. 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/QZGLS2087400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18f0b244ed1175f11f1cdbaa7c09053b8f5719d1b7620dc71f95c7b968e742b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/COC011530567.
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