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 0xba06e45c8939ffc85b89ced260558b24abb978c3835579c685abfbf5fb87eae5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/376d1cf3-6f6a-439b-8e0e-a016ceae5aa7.json and https://artists.proofprofile.net/proofs/artist/376d1cf3-6f6a-439b-8e0e-a016ceae5aa7.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 0xb9e571cc976c1447cc9b483464f43644fbf2049a3d799859efe7f4d74041291b. 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/TCAIO2437255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc23bcfedfc6c740c8a5ec81def985d28dd8ae864d43cc718ce890b0d606d10. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAIO2437264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f7dc61ff69453a94110977c1718ca3c3fcbf57546e5c5d2750577c5ec23da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIO2437268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3067d8e15aad8290f155b0b46406723db565f5ad9383fc254b4d9ddc65573fc4. 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/TCAIN2437269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953f4d815f21e1a09ba399a9651c050f7e2070ff0ca5009aef9c746d8c69086a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:01Z), 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/TCAIN2437273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ec03ebd5efeb5ccc06b5399f2f9451bb9abf6f2c21bd17cd0a9c48d7b9b143. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIN2437280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7c3d8140104efe0da17cf280ea945bde16c76ef0ee0a5a49dab736f248e82b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:27Z), 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/TCAIN2437286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfbc4b0956de58cc711315e7edd30e37a97858fcddce81bbfdece7854626b82. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIO2437290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0d3398d91e86f7c1fdf04afeb85d4f2fff49576513d7c66c9220894649c54. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:13Z), 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/TCAIN2437294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0362938df30981d02b599a6d31585021e380d2573e72b82499469aead6fffa84. 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/TCAIO2437296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f20de19dd61915308e39f3272fad0a0aeb4ede6e90dfcc77836d59af7f1ef. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIO2437302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b74214e05197e15a99469c4b5af9a130a791bf4fb662acf89567f0ab4d6ce7. 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/TCAIN2437308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1115103bda3d0fdb72c86eb7578bf456406b1c8da7c41b6f55bddcceb6a4fa18. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAIN2437313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab803ab47994cab294254df3bcdba63925ce345c3d688c2dc571124c8c17eab9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIN2437319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f2f1153cb078a662df7704a64b77f2170f5b965209e636498b3b0ce82ca891. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIN2437322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387bed104c830121ba05ad5e6a792324f54bb7fbcd252ff77226306ae1d7f6a8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIN2437329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a484a04b36d4fb11735db98fd0fa222a290444615f7b6738923b180fd0ff9. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIN2437332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62bb80679f0c907f6820ac8985852fa33d09912c7bb2386d11756fd1c0cd0f. 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/TCAIN2437338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45e38c41adfd3152305b2718b84ef6e765ebc5a133060afb24d2f95b09f13c3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIO2437341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2006f81d69c19117ab05d64e579e6c0ff90817a349947301adbf33150475f2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIN2437345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f564a2668ab535917d49f287027bcaa8397fa8cc00a0b243d5f579a85dc5e6f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIN2437347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7077602aa69e702d29b05e626c2318e96b96c1557f345e336db4fa1e5c6c01cc. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:22Z), 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/TCAIN2437355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a4c4c707bf58fd25597cd49bdfee8c421c52743683fb8226ce35f7dcdf36d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIN2437360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d292a62752df55a5c5469460813c049548988d3ca650eb22d670364cee912d7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIO2437367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac73b1c6edc9711b746c1b20da3a8f905afbe1b2f22d18f11948d9c312f302fe. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIN2437373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d1e902e76f338849bbb1ddf8c362721c1e50958a3aeb57b9e6ba57ed3b673f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:02Z), 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/TCAIO2437382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97af4152f79c239b51f8eb818f0bccd8a3b28069818b4a024a385786faaa5701. 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/TCAJL2562921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9452005cd995e20e27d0be8b1dca865d28adc185c2919155fe4b12856b5acf09. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:01:03Z), 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/TCAJL2562930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4108e2d87c780939fa793c7255c82253eae7d86d5ed0b4397948112dc18a6006. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:44Z), 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/TCAJL2562850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50279459867905bbba7f5b083ffdd5f0ea62d7d236d5cd96f37a20edc3fe8b75. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJL2562871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9660bd4d1c272597e584fba6c46409427342d88308acd87ea51c310a57e39fa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJL2562943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898777e1c466e3ac3eb6a92bd246e36550e1a5a71a6e08cba113ed6e43d2c604. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJL2562885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615756c248827af3f175bd6a850fcae94b74adde8dadd1bb76a68e3c778e76cc. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAJM2515413.