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 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 0xd8405950ff492022a74017fef58bc1f71b16bda7dd3c6cfc8db8c304595604ee. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ba318d-1324-4044-913b-bcabbd30d987.json and https://artists.proofprofile.net/proofs/artist/c3ba318d-1324-4044-913b-bcabbd30d987.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 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 0x75a28f956f49777221ac6981bc37d4b95f630ea4be57a9bc1a8d4adbd6e73d94. 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/KRNAR2351975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e66f242e8184aa2bf47c624e99f0fa6a0ac2c2e77932c497f9da1676ddebdc. 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/KRNAR2351976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037fcbcb5e50fa8db0d2cdf4be22f7cd1c7e4e477a247937be0c96ce6bf699fd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/KRNAR2351977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea1d3a3a737981ccde89e49decf48ff577a1ddceae2d25412cd2465767f4d8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRNAR2351978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f9d2ae0d0482d5d3f2b504c7d39864e2b595a278b897e350d4cd087b79cf81. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/KRNAR2351979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a16b6e46c952d27986653967503f8ecb3b56aa8b80c5d665f4f14b64c5114. 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/KRNAR2351980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752543646df21775489e96122691413f32fadf15772828e2264360582a3fadf1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/KRNAR2351981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b520455a8b24192b45f028eb919eeaefe19432840e3928c001133a97fc79245. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRNAR2351982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e732e9aaec56f5e196ef4fcdb8b966fb55b12816f138f9dd12601fe5b917d6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRNAR2351983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed497771bff0abdb11d4483317ca0d0e3955b22d76403ad56c6ef7b0b9d61d8. 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/KRMIM1918988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5402097471ccc7dd01b614ed3b9be2259f55fc48fc3dd1c5a5654b38951a3a0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/KRMIM1918989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed729c44462d4f5d116809882e0b4413d8651ac446549a3faf62fd38ed0b0a2d. 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/KRMIM1918990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b4e37f6b3e1c3b93cbda7e356c18f643257dd3936b6d6329a0e58400a5d338. 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/KRMIM1918991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941d3ef19addb864f579401a5d46b7d2913b35e8296720efa349aa72c4cb9744. 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/KRMIM1918992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc966fd9ca43c7c8fd73b5a40b919668ba6e9d7b857e6837bc0bf01e7e7c00. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/KRMIM1918993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80461df9591f9a3c27e288b3a1e8d3980df4a2d212cce08d7ae3c15e6e116d36. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/KRMIM1918994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44c11173d7f6726afc00bb5f3731070ecec820515262db3c4891a5c71322a6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/KRMIM1918995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d25ddd7ff3446c6cfe3f8baaa4fd0b3aa9c6843970e85a24ab3d50dc83dffa. 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/KRMIM1918996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336ad46883c239d7c6a7f122d8b1bbfd2d4b750b2fbc23be8dd5b44b913e25a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/KRNAR1704293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6473a8314eedd905dc2f4b31ca94c99dfc043fb9a9997a7752f429c8ca8ceb5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/KRNAR1704294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4951bc13a2ea1af67f60603e96cf8a1c514fbd20a4646ce64be7fc186943c8d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/KRNAR1704295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fce98539eab70bcaa3a84efa3b58256b0de14f6ce18dba9f8020ab08e430c1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/KRNAR1704297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f9f3ce176519a7b73ab8938fb4032a6cdbc4e9d6a6f80736ab66e8bffc5e79. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/KRNAR1704299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9300c43fbbb2bfcdafa1670636a3550912bf36b52646d1bcdb9a8b3ef57c5480. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KRNAR1704300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa571d0bc0cdf04086b7803b463de5ff286ef6ffe2e469d4f792f7d77fefeb374. 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/KRNAR1704302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b277a5871ebc3f8e240bf1ab91e86bcfd1331634bdbf459154ef712704257ae. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/KRNAR1704303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee395d30c2e0c6dfab74e5094032c522e36a190b33f0b0d705be8a3d2b45ef62. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRMIM2478789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ff2078df2acc3237c4fe4f2aca4cc43287471ef226a40b26cafe0985371778. 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/KRMIM2478790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feed67ad86fe05f4dae2faded4425dd0033b8a91b37ef6c5a975037ecda7fce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/KRMIM1915526.
Where Did All The Forgotten Things Go? - Zak_eun_mul ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9afef5e925f1f6f1171781392cc81dc7c697880c01f183fd65da22a59f5c77. 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/KRMIM1915515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e0adaeb8aff7003145d104fef135ea5054d24bf7f4d0765a2b43d991fd3db7. 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/KRMIM1915518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd579b1feacf01257019bbffbd20491509ac58b5f354aa72138bc3725d704faa8. 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/KRMIM1915536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c79d2dfb47ae262ba7756f9c73fd2212f11ccffa71ae32af1c1f6ff8de9ce8d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZF452009071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4378b2a40b40abb8c89e24fb8af89b2910e8212a7e8d32cbbc0454b323e0000. 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/QZF452009073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f8806f9bbc484001ccfd8d937b8e2274b21da3419e0a94ebfc2c5936a6b330. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZF452009075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f29ec62c07b7d81271bc517aec5bed43b55f4040539c13ebf43fcec428b619. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US9BP1781120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722d3fda6dd758414b239e1ab12e0d2c033b5fe8ed5fc7aba26a5193a284f70e. 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/US9BP1781115.