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 0xa82b8c2d7e4f4dba6237295d1908559d927d7d1f481b5d6a51507ef64355914c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c551ada-ebc3-42a1-9139-a361f00f102e.json and https://artists.proofprofile.net/proofs/artist/4c551ada-ebc3-42a1-9139-a361f00f102e.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 0x8a6d5e5ff04b3b25ec5a5a148eba74a918b1b9b494cec2d57636ad8dd30d0aab. 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/QZDA72038492.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b82274bc96f654110b7c63ad201f053bdd60d4cc995a7ef734c75ae97aafd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6M2208325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180bbc3f7cb2db6b5ef9a652770e16bad4320ccb5ec7bea77c23dde211daa8cf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6M2208330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57247ba186d99bd69c72389f62eb19a8e339af301723dab8adf0d271cdbe9d35. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2225703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56bd1b4c7f7da3633117f1e854f191f832eb92300aab2559ea7b52a5a6f9e1e. 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/QZNWV2225705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd522b81b8175e522d8a1eb639bbae7275eb41d7183bde26e0b4c57bbdd4d0a33. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMWW2459742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22a82e07be7643c6f0bf89b46b25c9007feedefd4c244df3236bf396767759b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZMWW2459743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6aa8a1007d4d222292a1d9b598b36ad138eb56a88178e1e861045aad0f048. 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/QZMWW2459748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518009e88d74b07bd1d414a420227daf134e1e4f8ac6b3d61837e9127bcd5510. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZMWW2459750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51548133a9517f7441fc5c7640e99506381134a45f8bba410dfb0b5978ad6bf. 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/QZMWW2459753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5cbc3c43e73e39544603969ecc07a5dc3662f9db7f0b740a6eb61a3f2d198. 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/USLD91771318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e578b5156718cc55d0e6fffb32961a0bce1a6e8b03fdd353a855f243fac5294. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USLD91771320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a217d85195b4503931d59e09db55cbb2fb838094d275e997c2b8093b78da9a. 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/USLD91771321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb96f420bac12b52511c110750a13a35745618b2e3f4e4fbec1f3a195f9cd44. 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/USLD91771322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313320974ae0dd47c807f434424b9e8fdba77666afd9038ed337d8040810e2d2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USLD91771323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3e55fcdd4dd5f054c06940102ed21382399a4f55c6c68295db38891f0566aa. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/USLD91771324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd540ea6049cbfd776ec81da574a2f063b2a3e0165adc776ffe0681ccdb567. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USLD91771325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb263b7870b4376cfb5ed39252664c7c7cf53ed0fa31fe26d65417770680cd82. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USLD91771326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c654b5167ad2c943d13ebfb65a8943ea7d7e025a424f14c953a14da9d10a1f8. 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/USLD91771327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4929399c6c9223906483e6cf19df9fedb5eeed558c6e09f2b6d1166ba08da59. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USLD91775686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324c8e4ce141147e3f88288255c6ee7dc710c7e28bb213e74c8cabd3dac7a10. 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/USLD91775687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9999471ac5da257f16abc4dff451b37315f261443884932bc29a3d9cae7b09. 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/USLD91775688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5fae37b0339201fa273b2271903e203f024f8a651d5de4174019e8554601a2. 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/USLD91775689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf075257db6bc2688b3ae8a5aee17574cf1bd9328b8eb0e43bffec3467d8b3efe. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USLD91775690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bebfd882629eb4bc4bfbeba8a8aac63c53ab285d3534945373ecf2ce2b40502. 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/USLD91775691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10b73211d10b7660d5d43ea214942f793ecb92a66e98a4aca9ce3d6f4a5873b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLD91775693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66676362c06e23582e8c09edac16908df0c912c842cc41b7897a54fce73223d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USLD91775694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a302e4e571d9a60aaffb4a4cc990aee105387462b812d734922699d2d0fe9dd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USLD91775695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ecc9a677fe29a7173ad11221cdda2d8bd6f8c5d40b541490aaf88f09ff0142. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USLD91775696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792c35393f34ee764fca50440a8f8fe14daf2002813fb43b4822c68f181a3161. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLD91778759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee98d379a8ae8b6ea056c9bffef63d0bfc8a6acd35fa7abd6b25863a2f2adf8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USLD91778760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc99af8fa62002fda6a6532f25dcb1128fc2968ca1d04f07a0627d4428e89623. 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/USLD91778762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d1448a6feee8bc78efb50fc76301a6f7216405209a69b178e7cd19e46d402. 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/USLD91778763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0a903f1f7e77e409697c027ff23b17ececdfc25a2bf2e4527483cc98ddf400. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USLD91778764.