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 0x6ef6420bbe8d5e5eb21b2aa4f225add4fcea9f051a46e5d3123aa5a6bfb6e320. 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/d148c055-bf0a-4005-a0a4-beba650adf7d.json and https://artists.proofprofile.net/proofs/artist/d148c055-bf0a-4005-a0a4-beba650adf7d.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 0x7f4813c17076a61c9b3f4c19e1038bcb685761654a0970eaf027cb68dcc94e11. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NLG660500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4813c17076a61c9b3f4c19e1038bcb685761654a0970eaf027cb68dcc94e11. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:37Z), 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/NLG660500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800606e13bd743d8c90b446b6c5acff05d40a870536211c283ae15a785d5c103. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:25Z), 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/CAHQJ1882117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcdb534fa8c1b825483093bf54c600be829c7bea1ff2422049b688facb546b5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLPM11100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01295106fdf632c3f5b72b6fe8416deda9c9f8af713f516571d0f565082cd979. 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/NLZ291300530.
Higher Ground (From The Voice Of Holland)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915033e7b7987f48eca807b7e123ae35980c1d8aeb45f59fd89600d08f8edae5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLZ291300615.
Kronenburg Park (Ga Die Wereld Uit) [From The Voice Of Holland]
Kronenburg Park (Ga Die Wereld Uit) [From The Voice Unplugged @ 538]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8f63d803d6c4d276209e4b290dde683d686d7acda45d299d539294abd2db26. 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/NLE8F1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07225291e8c56bb406181606d069cb67783172058a5551eadfb3d385292f7ed3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/NLMN21400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e50930ca5d8fdc77d55d9356f73a22b28fbd8655d6e39c037c51327601f06d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:30:33Z), 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/CAENV2083841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e53588d847a68844b8cc2f48f3e9853cbc3d5f77d9d93bf7c4daf3d352b1ad. 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/NLS241700680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf53e4608ff79f9b26cbe7b75e3305acc6cbe1499478713fc6abcc0a75355396. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL3H92400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447551be0c38635ded73199d1792fd8eeb7611409990dd7bd297aa44f7637132. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL3H92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08045d258044c5e73139dcaf6f5c65a48b32ec291c3a7a5f4624ddbe4142b1f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL3H92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9bf0e7501720ff0532a85671a082ca3c191b4f98db0f4fe99d5cde2eb9c1b9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL3H92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee207897bcd8ebb1b9c804e8e891c21d54197a3e32f02fae1bb29111272dbf93. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL3H92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadef9e85ed80068231be7f0bf90eea80c8766a381e3ad9de599a23d209e32c51. 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/NL3H92400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1c63055c70e002ddc3ffb4c8bc44f07e38187fe355c1565d431d12a99132ad. 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/NL3H92400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d0a6ca9dd28c8bf847c5ce2335a1f3bf2521a69d12339efed2c5d840f0be4b. 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/NL3H92400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a293fb4ea56bd26dce2d392008925e94ab179f5a49e2ac40e20466a552a33. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL3H92400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1fc84570384c3d21475b44133c74fa0deb6a9e1bef53e8d02bd40e053209f5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:47Z), 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/NL3H92400006.
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 0x98f83c3589599911adcdf25be829243756773c15cc61322951bd1aac6b6fccea. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLDG20800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc676c83071c004949964ef5e905e4bde6e8e98ae9e8ead4b79323d839bdbd. 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/NL3H92400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7756e4ea410df9f207053a76a9039932891ed2fdf37af4b5ff59eaf075be5e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/NL3H92400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeed93385019929dd57934aa8e6a74682fc5f8a39b0fc9d5ee462ba01edabd9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NL3H92400014.