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 0x5663cdf8807b2784bde58ef07e9afac8d2992a81974e2c8bb024dcc4e07f001f. 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/e3d8decc-7f73-4312-ada8-b071a9a7db35.json and https://artists.proofprofile.net/proofs/artist/e3d8decc-7f73-4312-ada8-b071a9a7db35.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 0x8c48fbd8806b5ba6c2fd01297201ed9b8bf4aef299c9a80ce34713a44e4204e2. 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/SELAA9101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc1a0d5577f4cc6b0bb7e0762982d48d61ea20147d630b907a190a07234667c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/SELAA9101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f8720a4c7bff9c674af7efb0d99937354527a9150e9e14a308923cd85cd63b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SELAA9101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e3abc1b57e1a46f3c2188464544078279c9b9ecb9c867db4e3f47b294d193. 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/SELAA9101007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34fa08747f90a11574e3cf14b47d2987a5371180efec7b3404ea78e4c6f724d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SELAA9101008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe0dff07f766a18aa86687bb062940a530afa2dba217737e5fac36068ce34a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SELAA9101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525b50a73f154a3a2c1dfeeef9ca87a34c1a6feb0448e7aac7990410ca4848e5. 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/SELAA9101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05897a3545b2ea19749513622aaa1523bfaddbf0c281c810f880a90882ad580e. 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/SELAA9101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4dc39c84efeefa6aa096a0cc2b549f6b0ae525654639d2626570d354ff3c98d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/SELAA9101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3323bd63c39153d47ee2dfcada13208a0e64d6db717ab82a742f3c98fc0f5d2. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/SELAA9101014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b9e6f33d7d72f5ef064e74730cc396be8284ef9b2f789951fae058bcb5fca. 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/SELAA9101015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b954f30a0e2b8525cbc19869d7f4e3fcb12792e5002efabcf98f39d8ce8098. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SELAA9101019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8db6f0448c0b86040e650339de7347599997ef925925f4f21b52f7e371313f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/SELAA9100911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d062ca1a0aba0541fbf5715ffc5b09bdf3db5d90d63c903a6b0dd51ab4e596b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SELAA9100912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797cb7fb9540f1e778e51badb7ffa99cb8346cae7ff93b2c385d8970b4aa7fcb. 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/SELAA9100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8078591a540804e7732af5295dc4487965e906a05a626c7a3e5b3797a43fd800. 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/SELAA9100904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8608b4e8201bdf28ac8d73e6e68dc57b02a43753b401bb6b2df05a2faa8300. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SELAA9100906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd642bf39c872f89daa57e2025b880923655eed77ec801b622d95bd72d5a538. 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/SELAA9100909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a1f2d4a16629e2a81fb7cd6bf017447975ab932d43bed913c90e3c0411e7c. 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/SEWRA9300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9bcce1f3af9a233b8a00ceebf3bbfd17050d072e9775e73730ad1a55a2a477. 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/SEWRA9300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec987e48627f191b4bbce6b9e680232d9194c17308974f6c40f58f58d1ce0b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEVVF1603303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848e8964adba78ab7e7b12870dbbb36df2630605f6e484f083f630ed0b3caea8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEVVF1603305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b49628fb18de29f93298f5a20f62b9bb4a7615a156f1d8381682f93ed3ac6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEVVF1603306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d76ff0b8d9146c9776ed818e62ae616aec8f980b86cb59934caf1c29657d46f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEVVF1903401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62718e790b16761f4909a6916cd03e21a8a652ca9a1e2fd1f31a25675aed1e. 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/SEVVF1903405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77b4a7b99ffd1b4d2dcfbb849f17e35e9cdc95944d939c3dda6987adafc87e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEVVF1903406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635c01773db2206e9ef445c3150d771c283b1ce04f613474714e68bde6d3403. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEVVF2202801.