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 0xe62d223741704ee191e08a4690bf2bee2533c38eed1b519cb51b9fcb3bd76716. 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/5d8a3a1f-fc29-49fa-b5af-289f9d27c387.json and https://artists.proofprofile.net/proofs/artist/5d8a3a1f-fc29-49fa-b5af-289f9d27c387.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 0xd4a4af19a9f3b42832623bb8e72a38bbe0d982f7938db54da0f23311f0e635d6. 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/QZFYY2177874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2069758b93679f49e46cd71f8265464afd7d5ceb9cd670e17deedf205de51. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYY2177876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d33bda2e34e13ef35799353dcd21bd083ad923081517ad759caab2f6581553c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:39Z), 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/QZFYY2177877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cfced80e36cd29ba846e6273063528031451ada8072b8ef0be2ddb6644b39a. 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/QZFYY2177879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69fe573db9d61d0e9ca03a8344a87a75f5e03262b7735abff5ebacc84db6ef. 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/QZFYY2177880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6852bbd72546d0efab985a9ad215a59850e742a324d6be33b71117c96d3dd5. 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/QZFYY2177881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238cd4d8bf433a7ae8fa229e577cecfde279728c28cf888f82059b058a596c79. 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/QZFYY2177883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7008f6bae9a9023dc9eaf35e893ea794ecc8b97337cc018854c8b4c2bb8ae6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN92145195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b23dfc2f5e0f36c3907455441d9e497177c7cc7b8d6135d94f6a71ea4a9f8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWW2166670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddca47f1f9ac744dba269059054eb444e1e9e5e133cc2eae153270a866f62d46. 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/QZNWW2166673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d46f5bc7897ad1d5d129c031cb72ba68f6d3ab28e1eab7558b8acf834cf77. 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/QZDA52264605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a66e64c951a23ae263d936b80aadfb4abea6467aaf42c7ca5662e4e844ce40b. 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/QZK6J2201211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d757d6047856349616964ac3856699a7afee50feb05d90142f8e826e1b2a271. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ITFRN1800214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc604c7701db440ba2a989e67c4d937807139f5036f0caded000dff9f09f697cb. 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/ITFRN1800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bbaab9e4ac73de83352e9bd52c94c07436c9b7a1f3a9572e9267ad3181b5e3. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ITFRN1800218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc0dc8b8752fdafefd0b0879bc16571df4d57c9da27c5fbd8d76189009ceaa2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:21:26Z), 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/ITFRN1800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76f1cd9fdfd03360a350501dabe1c3156a1e7a8d05ac4aa79ca78d66c21429. 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/ITFRN1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3c24ac4048f3d05404e076f01d813963eeb6c193b990059f95a37f5315a07. 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/ITFRN1800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a98eb02d2206b0506bfeb091626dac65cd8d1d34fa1a4295c42c83bdcf135c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZTAY2371767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f604321d8e23fd46d6cc1d66d3d690483f59557987db88c76f0c2cca69de933. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA52463950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8105cc534ee8e3f3bd8394bd24e0c0593aa5a70781ea929d068cbe01fcad7a6c. 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/ITFRN1800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62156a310bead8cca4647b04c33f5d78cd103d1510a52ac9bf7ad30ef73d0d8. 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/ITFRN1800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62156a310bead8cca4647b04c33f5d78cd103d1510a52ac9bf7ad30ef73d0d8. 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/ITFRN1800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d493845fc08282d3d61e1c71a2f3fe4593c396f389dd2d5d6d3324d1d2af36b. 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/ITFRN1800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff8f9f0978b2869187c222a9217c1619b4ec66bade620a1a3831932a40aaa6. 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/ITFRN1800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0319855c4742c42f27ccc4a342471e610348631265a82f7fcf9f89f975b735a0. 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/ITFRN1800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2a17e85ea7f821198eb8dca6870ec18c1211b4290f1162f0c5132345c449b2. 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/ITFRN1800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb589e91c5ca2200fde93ac09ec3aad6396864a35fd2bc1daf2cfc89fcf9d50ab. 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/ITFRN1800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8105cc534ee8e3f3bd8394bd24e0c0593aa5a70781ea929d068cbe01fcad7a6c. 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/ITFRN1800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b38406aa5792c4eb2c0b0c07282ace13a5739f8e3c1d65f8d6ea5846e2bda. 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/ITFRN1800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0200219f2f2e06b066b2c3d430bad42d0f19aeab68ae00db815ee9b9a8a9697. 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/QM4TX2344317.